The situation _____ immediate action.
A. calls up
B. calls for
C. calls over
D. calls out
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Scientists hope they can _______ in cloning.
A. make a breakthrough
B. make a fuss
C. make a backbreaking
D. make a faith
She fetched the bricks four_____ in order to save time.
A. in time
B. at a time
C. on time
D. at the same time
Only in a few countries ____ enjoy a reasonable standard of living.
A. the whole of the population
B. where the whole population
C. does the whole of the population
D. will the whole population
Can you _____ that problem?
A. work for
B. work out
C. work over
D. work in
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