You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.

  A. that; what       B. what; /              C. which; that              D. /; that

Doris' success lies in the fact _________ she is co-operative and eager to learn from others. 

A. which       B. that         C. when        D. Why

Bad luck .Our maths teacher keeps us ______too much homework.

        A.loaded with    B.supplied with   C.proviede with     D.providing

Some researchers believe that there is no doubt ______ a cure for AIDS will be found.

  A. which     B. that         C. what          D. whether 

It has been announced that candidates ( 候选人)_____remain in their seats until all the papers has  been  collected .   

A.can          B.will        C.may        D.shall

The people,____had been damaged by the flood ,were given help by the Red Cross .

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

______ made the school proud was ______ more that 90% of the students had been admitted to key universities.

　A.What…because　　B.What…that　　C.That…what　　D.That…because

Could I speak to ____is in charge of International Sales ,please ?

 A. anyone            B. someone           C. whoever           D. no matter who

Quite a few employees’ payments are cut down and barely cover their household ________ due to the serious economic crisis.

 A. bills    B. expenses     C. prices    D. charges

“I don't think it's my ________that the TV blew up. I just turned it on，that's all，”said the boy.

A. error                    B. mistake            C. fault                        D. duty