单项选择题

The students are ______ to hand in the exercises before class.

A．expected
B．hoped
C．agreed
D．promised
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—How long has this bookshop been in business— ______ 1982.
A．After
B．In
C．From
D．Since
单项选择题
If you keep on, you' ll succeed ______.
A．in time
B．at one time
C．at the same time
D．on time
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