I’ll never forget the holiday we spent together.A. WhenB. howC. in whichD. that

问题补充：

I’ll never forget the holiday we spent together.

A. When

B. how

C. in which

D. that

答案：

A. When

B. how

C. in which

(答案→)D. that

解析：定语从句。holiday在从句中充当spent的宾语。