问题

He was hiding behind the door _________ hecould see what was happening.
A:it
B:that
C:when
D:where
B:that
C:when
D:where
正确答案是:
同类题型
He chose to teach in a western province, though he ______ in the city for a better life. [ ]
Sharon, remember to lock the door before leavingthe house.– ______.A.Yes, please
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