It is at 5 a.m. ____ the train from Beijing to Guangzhou will arrive.
A. for
B. with
C. that
D. when
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God knows, how can I ________ six exams a week?
A. endure
B. tolerate
C. bear
D. suffer
All their attempts ____________ the child from the burning building were in vain.
A. rescued
B. to have rescue
C. to rescue
D. in rescuing
Could you find someone _____________ for me to play tennis with?
A. to fit
B. fit
C. fitting
D. suit
The smooth space flight marks a big ____________ for Chinese scientists.
A. break
B. breaking
C. breakup
D. breakthrough