单项选择题

______ drills that have no real topic have to remain as they are.

A．Manufacture
B．Manipulative
C．Manipulate
D．Manifest
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单项选择题
We are convinced ______ the righteousness of our cause.
A．of
B．on
C．over
D．at
单项选择题
______ trouble, I' ll forget the whole thing.
A．Rather than caused
B．Than rather caused
C．Than rather causing
D．Rather than cause
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