单项选择题

Sometimes it is necessary to be careful ______ the right date to sit for a test.

A. when choosing
B. when you will choose
C. when you have chosen
D. when you chose
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Tina’s children, ______ all. live nearby, organized a big party for her eightieth birthday.
A. who
B. that
C. which
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单项选择题
Lest anyone ______ it strange, let me assure you that it is quite true.
A. thought
B. should think
C. had thought
D. thinking
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