1．用reason，cause或excuse填空
(1)The ________ why she was ill was that she had eaten bad meat.
(2)The heavy rain was the ________ of the flood.
(3)I made an ________ at the first possible moment，and got up to leave.
(4)The doctor had recorded the ________ of death as heart failure.
2．用find，find out，look for或discover的适当形式填空
(1)This kind of bird is only ________________ in Asia.
(2)Have you ________________ the wallet you have been ________________？
(3)Please ________________ when the train starts.
(4)With the help of high technology，more and more new substances ________________.
(5)I ________________ the job boring.
Ⅳ.单项填空
1．I can’t stand________with Jane in the same office.She just refuses________talking while she works.
A．working；stopping B．to work；stopping
C．working；to stop D．to work；to stop
