Medical treatment _______ greatly from state to state.
A. various
B. variety
C. varies
D. varying
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The teacher would have to spend a lot of time _______ what the studen’ts already know in the subject.
A. find out
B. to find out
C. finding out
D. found out
His father _______ English here since he graduated from Peking University.
A. has taught
B. teaches
C. taught
D. had taught
His handwriting is not very neat. In fact, it is sometimes very difficult to _______.
A. justify
B. examine
C. identify
D. check
_______ on the tower, we could see the whole city.
A. Standing
B. Stand
C. Stood
D. To stand