单项选择题

The situation will continue to become worse ______ we take some measures.

A．when
B．because
C．if
D．unless
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单项选择题
Please wait me for a moment. I will be ready
A．by the way
B．right away
C．at last
D．in that case
单项选择题
He is going to pick up his parents, so we ______ with him.
A．needn't to go
B．don't need go.
C．needn't go
D．needn't going
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