单项选择题


A．Before
B．After
C．When
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单项选择题
You'd better ______ in bed. It's bad for your eyes.
A．don't read
B．to not read
C．not read
单项选择题
By the end of 2000, all the teachers in our school ______ a computer of their own.
A．have had
B．had had
C．will have
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