单项选择题

I will not lend the book to you ______ you can return it in time.

A．in case
B．so that
C．unless
D．if
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单项选择题
He is one of the leaders ______ to attend the important international conference.
A．who have been invited
B．who has been invited
C．whom they have invited him
D．whom has been invited
单项选择题
The president who has won the election ______ on television next week.
A．be to speak
B．is to speak
C．is speaking
D．to speak
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