The hall we saw the film was very clean.A. thatB. whichC. in whichD. in that

问题补充：

The hall we saw the film was very clean.

A. that

B. which

C. in which

D. in that

答案：

A. that

B. which

(答案→)C. in which

D. in that

解析：按题意，这里填入介词in+关系代词，相当于 in the hall，而介词后面接 that不接 which