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BBC Compacta Class 9 Solutions - Classroom Assignment- 31

(A) The following passages have not been edited. There is an error in each of the lines against which a blank is given. Write the incorrect word and the correction in the space provided. Remember to underline the word you have supplied. 

1.
Ans: (a) little → few
Correction: During the past few years

(b) has → have
Correction: house sparrows have started to

(c) (No correction provided as the line is correct.)

(d) using → use
Correction: due to extensive use of pesticides

(e) a number → the number
Correction: and decline in the number of thatched houses

(f) what → which
Correction: which provided scope for nests.

2.
Ans: a. much → more
Correction: Sleep more to stay in shape.

b. that → (no correction, sentence could be restructured for clarity but no specific incorrect word here)

c. or → and
Correction: between sleep duration and overweight risk

d. (No correction needed as the line is correct.)

e. finds → find
Correction: Researchers find that children who

f. least → less
Correction: do not sleep enough – less than 9 hours

g. like → likely
Correction: were more likely to be overweight,

h. its → their
Correction: regardless of their gender, race, socio-economic status, or quality of home environment.

3.
Ans: (a) an → a
Correction: Esther Bryan of Canada designed a

(b) weave → woven
Correction: unique quilt, woven together with

(c) represent → represents
Correction: symbolism, stories and threads represents

(d) (No correction needed as the line is correct.)

(e) are → is
Correction: colourful work of art is 36 meters

(f) on → of
Correction: It consists of 263 "blocks",

(g) something → something from
Correction: representing something from every nation in the world.

(h) has be → has been
Correction: They has been named the "Quilt of Belongings".

4.
Ans: (a) America → American
Correction: American Kevin Shelley set

(b) break → breaking
Correction: a new record by breaking 46

(c) (No correction needed as the line is correct.)

(d) on → in
Correction: head in one minute.

(e) were → was
Correction: The amazing feat was performed

(f) (No correction needed as the line is correct.)

(g) into → in
Correction: Records TV show in Cologne,

(h) in → on
Correction: Germany on September 1, 2007.

B. The following passages contain some errors which have been underlined. Edit them by choosing from the appropriate options.
5.
(a) 
Ans: (iv) about
I don't know what to do about my friend...

(b)
Ans: (iv) who
...my friend who is always...

(c)
Ans: (ii) worrying
...who is always worrying about her health.

(d)
Ans: (iii) find
You will either find her with a doctor...

(e)
Ans: (iv) Every
Every time I advise her not to...

(f)
Ans: (iv) falls
...my advice falls flat on her.

(g)
Ans: (ii) that
I'm afraid that worrying this much...

(h)
Ans: (i) will
...will make her a nervous wreck.

6. 
(a)
Ans: (ii) have applied
I wish to have applied for the post of...

(b)
Ans: (i) an
...an Assistant Manager in your hotel...

(c)
Ans:: (iii) which
...which was advertised in the Indian Express last week.

(d)
Ans: (ii) got
I got my BA degree in the year 1990 from Delhi University.

(e)
Ans: (ii) have specialised
I have specialised in International Tourism.

(f)
Ans: (iii) many
I have attended many conferences...

(g)
Ans:  (iii) during
...during my course.

(h)
Ans: (i) as well as
My mother tongue is Hindi as well as I also know English and Urdu.

7.
(a)
Ans: (ii) although
The classical Venetian boat is the gondola, although it is now mostly...

(b)
Ans:  (iii) used
...used for tourists...

(c)
Ans: (i) other
...or at weddings, funerals, or other ceremonies.

(d)
Ans: (iv) travel
Most Venetians now travel by motorised Waterbuses...

(e)
Ans: (ii) regularly
...which ply regularly on fixed routes...

(f)
Ans: (iii) on
...on the major canals and between the...

(g)
Ans: (iv) cities'
...the cities' islands.

(h)
Ans: (iii) many
The city also has many private boats.

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FAQs on BBC Compacta Class 9 Solutions - Classroom Assignment- 31

1. What are the key concepts of algebra?
Ans. Algebra is a branch of mathematics that deals with symbols and the rules for manipulating these symbols to solve equations. Key concepts in algebra include variables, constants, coefficients, equations, expressions, and functions.
2. How do you simplify algebraic expressions?
Ans. To simplify algebraic expressions, you need to combine like terms, perform operations such as addition, subtraction, multiplication, and division, and follow the order of operations (PEMDAS - Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).
3. What is the difference between an equation and an expression in algebra?
Ans. In algebra, an expression is a combination of variables, constants, and operations that does not have an equal sign, while an equation is a mathematical statement that shows that two expressions are equal. Equations have an equal sign, while expressions do not.
4. How do you solve linear equations in algebra?
Ans. To solve linear equations in algebra, you need to isolate the variable by performing operations such as addition, subtraction, multiplication, and division to both sides of the equation until the variable is alone on one side. The goal is to find the value of the variable that makes the equation true.
5. What are the different types of functions in algebra?
Ans. In algebra, there are various types of functions, including linear functions, quadratic functions, polynomial functions, exponential functions, logarithmic functions, rational functions, and trigonometric functions. Each type of function has its unique characteristics and properties.
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