Most advanced aircraft now ____at supersonic speeds.a)could have flyb)...
Most advanced aircraft now ____ at supersonic speeds:
- Option A: could have fly
This option is grammatically incorrect as it should be "could have flown" instead of "could have fly".
- Option B: shouldn't have fly
This option is grammatically incorrect as it should be "shouldn't have flown" instead of "shouldn't have fly". Additionally, it does not make logical sense as it implies that the aircraft should not have flown at all.
- Option C: are able to fly
This option is correct grammatically and logically. It states that the most advanced aircraft are currently capable of flying at supersonic speeds.
- Option D: had to fly
This option is grammatically incorrect as it should be "have to fly" instead of "had to fly".
- Option E: were supposed to fly
This option implies that the aircraft were intended or expected to fly at supersonic speeds but may not necessarily be able to do so currently. It does not accurately represent the current situation.
Conclusion:
The correct answer is Option C: are able to fly. It accurately describes the capabilities of the most advanced aircraft currently, stating that they are capable of flying at supersonic speeds.
Most advanced aircraft now ____at supersonic speeds.a)could have flyb)...
Understanding the Correct Answer
The sentence "Most advanced aircraft now ____ at supersonic speeds." requires a verb that correctly fits the context of current capabilities of advanced aircraft.
Analysis of Options
- a) could have fly: This option is grammatically incorrect. The correct form should be "could fly" or "could have flown," but it does not indicate current capability.
- b) shouldn't have fly: This is also incorrect. It uses the wrong verb form and suggests a negative past ability rather than current capability.
- c) are able to fly: This is the correct option. It uses the present tense "are" indicating current capability, along with "able to fly," which clearly states that advanced aircraft have the ability to fly at supersonic speeds now.
- d) had to fly: This option implies a past obligation rather than a current ability, making it unsuitable for the context.
- e) were supposed to fly: This suggests an expectation in the past, not a current capability, which is not what the sentence conveys.
Conclusion
The correct answer, option 'C', "are able to fly," accurately reflects the present capability of advanced aircraft to operate at supersonic speeds, emphasizing their technological advancement. This option conveys the necessary information about current abilities, making it the most suitable choice for the blank in the sentence.
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