单项选择题

62（）

A．in which
B．on which
C．to which
D．for which

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单项选择题
61（）

A．to give
B．giving
C．to be giving
D．have given
单项选择题
It was essential that the application forms ______ back before the deadline.
A．must be sent
B．would be sent
C．be sent
D．were sent
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