Question

1. Fill in the blanks using a word. Write the answers in your answer sheet against
the correct blank number.
Passenger airplanes mostly fly (@
speeds less than that (b)
sound. Airplanes (c)
can fly (d)
greater speeds have been
built. This is (e)
if they fly .
speeds greater (g)
the
speed of sound, (h)
fuel consumption increases enormously.​

Answer 1

Explanation:

'A' and 'An' are indefinite articles which are used before unspecific, singular countable nouns. 'The' is a definite article and is used to refer to specific things.

'A' is used before words beginning with a consonant sound.

'An' is used before words beginning with a vowel sound.

In the given sentence, the word 'aeroplane' begins with a vowel sound, and it is unspecific. Therefore, the correct option is B) an.