单项选择题

We believe him to（）a mistake.

A．have made
B．be made
C．have been made
D．making

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单项选择题
There is an arrow on the wall（）the direction of advance.

A．pointing
B．identifying
C．marking
D．indicating
单项选择题
The residents,（）had been damaged by the flood, were given help by the Red Cross.

A．all their homes
B．all of whose homes
C．whose all home
D．all of their homes
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