单项选择题

There is no doubt __________ you will pass the exam this time. You have worked so hard in the past months.

A．whether
B．that
C．if
D．what
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单项选择题
Lisa was busy taking notes __________ Mark was searching the Internet for information.
A．until
B．unless
C．while
D．if
单项选择题
I’d rather you __________ anything about it for the time being.
A．don’t do
B．don’t
C．didn’t so
D．didn’t
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