单项选择题

The paint is still wet, ______!

A．Be not sure to touch it
B．Be sure not to touch it
C．Be sure to not touch it
D．Don't be sure to touch it

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单项选择题

Jenny didn't have time to go to concert last night because she was busy ______ for her examination.

A．preparing
B．to be prepared
C．to prepare
D．being prepared

单项选择题

I am disappointed with the new officers elected in our club , but there is no point ______ about it.

A．to worry
B．in worrying
C．for us worrying
D．with us to worry

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