单项选择题

My grandfather ______ ,the Red Army 40 years ago.

A．joined
B．took part in
C．attended
D．joined in
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单项选择题
We are going to Shanghai ______.
A．by a plane
B．by the plane
C．by plane
D．on plane
单项选择题
The tree ______ fall.
A．is to
B．was to
C．is going
D．is going to
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