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_____________ (you / lock) the door before you left the house? 
Correct answer is 'Did you lock'. Can you explain this answer?
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_____________ (you / lock) the door before you left the house?Correct ...
Did you lock the door before you left the house?
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_____________ (you / lock) the door before you left the house?Correct ...
Answer:

Explanation:

The given sentence is in the form of a question, which means it requires an auxiliary verb to be added before the subject of the sentence. In this case, the auxiliary verb would be 'did'.

Reasoning:

The reason 'did' is used as the auxiliary verb is because the sentence is in the past tense, and 'did' is the past tense of 'do'. The main verb 'lock' remains in its base form because it follows an auxiliary verb. Therefore, the correct sentence would be 'Did you lock the door before you left the house?'

Summary:

To summarize, when asking a question in the past tense, an auxiliary verb (such as 'did') must be added before the subject of the sentence, and the main verb remains in its base form.
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_____________ (you / lock) the door before you left the house?Correct ...
The sentence is an interrogative sentence as we can see there is a question mark at the end. the verb left shows that the question is about something u have supposedly done in the past. let's take an example :
_ (you/eat) apples and drink milk?
answer: do you eat apples and drink milk?
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InstructionsThe schematic diagram below shows 12 rectangular houses in a housing complex. Housenumbers are mentioned in the rectangles representing the houses. The houses are located in six columns - Column-A through Column-F, and two rows - Row-1 and Row-2.The houses are divided into two blocks - Block XX and Block YY. The diagram also showstwo roads, one passing in front of the houses in Row-2 and another between the twoblocks.Some of the houses are occupied. The remaining ones are vacant and are the only onesavailable for sale.The road adjacency value of a house is the number of its sides adjacent to a road. Forexample, the road adjacency values of C2, F2, and B1 are 2, 1, and 0, respectively. The neighbour count of a house is the number of sides of that house adjacent to occupiedhouses in the same block. For example, E1 and C1 can have the maximum possible neighbour counts of 3 and 2, respectively.The base price of a vacant house is Rs. 10 lakhs if the house does not have a parkingspace, and Rs. 12 lakhs if it does. The quoted price (in lakhs of Rs.) of a vacant house iscalculated as (base pric e) + 5 × (road adjacency value) + 3 × (neighbour count).The following information is also known. The maximum quoted price of a house in Block XX is Rs. 24 lakhs. The minimumquoted price of a house in block YY is Rs. 15 lakhs, and one such house is in Column-E. Row-1 has two occupied houses, one in each block. Both houses in Column-E are vacant. Each of Column-D and Column-F has at least oneoccupied house. There is only one house with parking space in Block YY.Which house in Block YY has parking space?

The schematic diagram below shows 12 rectangular houses in a housing complex. Housenumbers are mentioned in the rectangles representing the houses. The houses are located in six columns - Column-A through Column-F, and two rows - Row-1 and Row-2.The houses are divided into two blocks - Block XX and Block YY. The diagram also showstwo roads, one passing in front of the houses in Row-2 and another between the twoblocks.Some of the houses are occupied. The remaining ones are vacant and are the only onesavailable for sale.The road adjacency value of a house is the number of its sides adjacent to a road. Forexample, the road adjacency values of C2, F2, and B1 are 2, 1, and 0, respectively. The neighbour count of a house is the number of sides of that house adjacent to occupiedhouses in the same block. For example, E1 and C1 can have the maximum possible neighbour counts of 3 and 2, respectively.The base price of a vacant house is Rs. 10 lakhs if the house does not have a parkingspace, and Rs. 12 lakhs if it does. The quoted price (in lakhs of Rs.) of a vacant house iscalculated as (base pric e) + 5 × (road adjacency value) + 3 × (neighbour count).The following information is also known.1. The maximum quoted price of a house in Block XX is Rs. 24 lakhs. The minimumquoted price of a house in block YY is Rs. 15 lakhs, and one such house is in Column-E.2. Row-1 has two occupied houses, one in each block.3. Both houses in Column-E are vacant. Each of Column-D and Column-F has at least oneoccupied house.4. There is only one house with parking space in Block YY.Which house in Block YY has parking space?

The schematic diagram below shows 12 rectangular houses in a housing complex. Housenumbers are mentioned in the rectangles representing the houses. The houses are located in six columns - Column-A through Column-F, and two rows - Row-1 and Row-2.The houses are divided into two blocks - Block XX and Block YY. The diagram also showstwo roads, one passing in front of the houses in Row-2 and another between the twoblocks.Some of the houses are occupied. The remaining ones are vacant and are the only onesavailable for sale.The road adjacency value of a house is the number of its sides adjacent to a road. Forexample, the road adjacency values of C2, F2, and B1 are 2, 1, and 0, respectively. The neighbour count of a house is the number of sides of that house adjacent to occupiedhouses in the same block. For example, E1 and C1 can have the maximum possible neighbour counts of 3 and 2, respectively.The base price of a vacant house is Rs. 10 lakhs if the house does not have a parkingspace, and Rs. 12 lakhs if it does. The quoted price (in lakhs of Rs.) of a vacant house iscalculated as (base pric e) + 5 × (road adjacency value) + 3 × (neighbour count).The following information is also known.1. The maximum quoted price of a house in Block XX is Rs. 24 lakhs. The minimumquoted price of a house in block YY is Rs. 15 lakhs, and one such house is in Column-E.2. Row-1 has two occupied houses, one in each block.3. Both houses in Column-E are vacant. Each of Column-D and Column-F has at least oneoccupied house.4. There is only one house with parking space in Block YY.Which of the following houses is definitely occupied?

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_____________ (you / lock) the door before you left the house?Correct answer is 'Did you lock'. Can you explain this answer?
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