请教2004-10-31

Carobee

D

C

B

A

31. Statistics indicate that approximate every 22 years--within a range of 3 to 4 years--a major drought occurs in the United States.

这题到底是A还是B呢？

在google上搜索，两种答案都有。

Carobee

up up,大家给点意见阿！

GREonlinetest

B

Carobee

?

可是Statistics是统计学的意思,是不可数名词,所以动词应该是单数啊??