Any airplane approaching the airport must ask Air-Traffic Control _____ ...

[ Prepositions ]

Any airplane approaching the airport must ask Air-Traffic Control _____ landing instructions.

A. up

B. for

C. on

D. with

Select your answer:

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My cousin will spend at least one year working abroad ______ he can find out how things operate overseas.

A. because

B. as so

C. so that

D. as long as