几个搞不太懂的填空题麻烦大家了!

几个搞不太懂的填空题麻烦大家了!
2.He spoke too quickly( )
A.understand B.to be understood
C.not to understand D.not to be understand
3.Is is often difficult to( ) what to do.
A.deciding B.decide C.decide oneself D.decide himself
4.It is necessary( ) the book at once.
A.for him to return B.that he returns
C.his returning D.to him to return
5.You go to bed at ten in the evening,(
A.are you B.aren't you C.do you D.don't you
6.Bill began to learn Chinese two years age,(
A.did he B.didn't he C.does he D.doesn't he
7.They will not go to the meeting tomorrow,(
A.will they B.won't they C.do they D.don't they
8.She can speak three foreign languages,(
A.can't she B.can she C.does she D.doesn't she
9.I needn't be there,(
A.need I B.needn't I C.do I D.don't I