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He found           very difficult           the math problem．
#52196
A
that；to solve
B
this；solving
C
it；to solve
D
it；solving
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It ____me about two months to  finish writing my new book in 2005.
#51944
A
spend
B
spent
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take
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Before the police         , the alien left the shop .
#58846
A
got
B
reached
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arrived
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—Can you find our city _______ a lot in recent years?—Yes. The road is wider and the buildings are taller.
#52116
A
has changed
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changes
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It ______ that he has been ill for a long time.
#58101
A
seem
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look
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I enjoy reading the novel that was written by Zhang Ailing.
#51938
A
written
B
writing
C
wrote
D
writes