单项选择题

It was not until he arrived at the railway station（）he realized he had forgotten his ticket.

A. before
B. since
C. when
D. that

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No one had told Smith about（）a lecture the following day.

A. there be
B. there would be
C. there being
D. there was
单项选择题
He has two Chinese English dictionaries,（）were bought last week.

A. two of which
B. both of which
C. both of them
D. all of them
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