单项选择题

I ______ my work by this time yesterday evening.

A．did
B．would do
C．had done
D．was doing
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单项选择题
When we ______ the museum is not decided.
A．visited
B．visit
C．will visit
D．visiting
单项选择题
I haven't seen him for quite a long time, but his parents ______ him sometimes.
A．still saw
B．still see
C．have still seen
D．has still seen
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