单项选择题

It isn’t quite _____whether she will take the advice.

A．sure　
B．right　
C．certain　
D．exact
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单项选择题
-----Nancy is not coming tonight.----- But she _____!
A．promises　
B．promised　
C．will promise　
D．had promised
单项选择题
We’ve made some achievements, but there is still a long way _____.
A．going　
B．to go　
C．gone　
D．to be gone
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