---The window is dirty.
----I know. It ______ for weeks.
A．hasn’t cleaned B．didn’t clean
C．wasn’t cleaned D．hasn’t been cleaned
He used _______ on the right in China, but he soon got used ______ on the left in England.
A．to drive, to drive B．to drive, driving
C．to driving, to drive D．to drive, to driving
The villagers went out to the mountain __________ the missing child.
A．in a search of B．looking after
C．searched for D．in search of
The room _______ very useful when we had visitors.
A．was proved B．has been proved
C．has proved D．proved
I doubt _______ he will win or not.
A．whether B．if C．that D．when
-----I’m afraid I’ve broken your chair.
----- .I can easily get it fixed .
A．You’re welcome. B．Not at all.
C．With pleasure. D．Never mind.
