The output of the wheat in Chongming County is three times__it was a decade

问题描述:

The output of the wheat in Chongming County is three times__it was a decade
A.than B.as C.that D.what
请问这题选什么,请讲一下原因,

C
times 后面直接加名词的,如果是接句子就用that.