1 . Kathy told me that all the doors and windows _______ when she arrived this morning.

A．have cleaned

B．have been cleaned

C．had cleaned

D．had been cleaned

2 . Experiments of this kind ___in both the U．S and Europe well before the Second World War．

A．had conducted	B．have conducted
C．have been conducted	D．had been conducted

3 . At the end of the meeting, it was announced that an agreement ______.

A．has reached	B．had reached
C．has been reached	D．had been reached

4 . The two nurses ________ 100，000 yuan by the police but donated it to victims of the explosion.

A．rewarded	B．would be rewarded
C．have been rewarded	D．had been rewarded

5 . After the argument Colin ran away and______since.

A．Isn’t heard of	B．wasn’t heard of
C．hasn’t been heard of	D．hadn’t been heard of

6 .      ，but he still could not understand it．

A．Tommy had been told many times

B．Having been told many timesC, Told many times

C．Although he had been told many times

7 . Yesterday we went to the library to do some reading， only to find that it ______．

A．had closed	B．had been closed
C．will close	D．will be closed

8 . It's great that all the visitors who              on the island were saved.

A．trapped	B．have been trapped
C．had trapped	D．had been trapped