For most people, it’s very difficult to _____ air on the top of Qomolangma.
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A
take out
B
take off
C
take up
D
take in
推荐题目
Listening to music makes Lily __________.
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A
to happy
B
to feel happy
C
feel happily
D
happy
 Our teacher asked us_________ the bus after the trip.
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A
to clean
B
cleaned
C
cleaning
D
clean