885 Section C－8

The unprecedented increases in the prime lending rate this year has probably been brought about by business community’s uncertainty about the President’s position on the budget deficit.

(A) in the prime lending rate this year has

(B) this year in the prime lending rate has

(C) this year in the prime lending rate having

(D) in the prime lending rate this year had

(E) in the prime lending rate this year have

答案是E，为什么动词要用复数呢？