单项选择题

Because of the unexpected changes, they postponed ______us an answer.

A．giving
B．have given
C．to give
D．to have given
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At no time______ other countries.
A．China will invade
B．will invade China
C．will China invade
D．invade will China
单项选择题
The pollution question as well as several other issues is going to be discussed when the Congress is in ______again next spring.
A．assembly
B．session
C．conference
D．convention
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