单项选择题

It is requested that the engineer______ the design immediately.

A．worked out
B．worked out
C．to work out
D．work out
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单项选择题
The teacher often warns the students that they can't be______ careful in answering an English paper.
A．much
B．so
C．most
D．too
单项选择题
—Did you telephone the manager's office—Yes, he______ back before tomorrow noon
A．express
B．is expected
C．expected
D．is to be expected
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