1 . I don't doubt ______ he has the ability to deal with the situation, but ______ the problem can be solved quickly depends on his attitude.

A．whether; if	B．that; whether
C．if; whether	D．whether; that

2 . When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.

A．why it is	B．what it does
C．why it does	D．what it is

3 . He said it was this classroom _______ he found his lost watch and _____ he would take good care of it from then on.

A．where; /

B．when; what

C．that; what

D．where; that

4 . Tom’s pay depends on ______ the factory.

A．he plays in what part	B．he plays what part in
C．what part he plays in	D．in what part he plays