Question

(ix) Passenger airplane mostly fly at speeds less than that (a)

sound, (b) airplanes which can fly at supersonic speeds have

been (c) . This is because if they fly at a speed greater (d)

the speed of sound, their fuel consumption increases

enormously.

(a) (i) with, (ii) of, (iii) to, (iv) for

(b) (i) although, (ii) because, (iii) since, (iv) otherwish

(c) (i) build, (ii) built, (iii) builds, (iv) building

(d) (i) then, (ii) than, (iii) by, (iv) to​

Answer 1

Answer:

(a):of/(b):although/(c)built/(d)than

Answer 2

Answer:

i)of

ii) because

iii) built

iv) than

Explanation:

Trust me ! I know English .