单项选择题

My brother ______ while he ______ his bicycle and hurt himself.

A．fell, was riding
B．fell, were riding
C．had fallen, rode
D．had fallen, was riding
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单项选择题
Shirley ______ a book about China last year but I don't know whether she has finished it.
A．has written
B．wrote
C．had written
D．was writing
单项选择题
There is a bird ______ the tree and there are many apples ______ the tree.
A．in, on
B．in, in
C．on, on
D．on, in
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