单项选择题

Mary ______ in bed all day because she had a fever.

A．lay
B．has laid
C．has lain
D．laid
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单项选择题
I should ______ him up to tell him the information.
A．call
B．calling
C．called
D．have called
单项选择题
When we ______ the museum is not decided.
A．visited
B．visit
C．will visit
D．visiting
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