The skirt she is wearing today was a birthday present from her mother.A. thisB. whoseC. w

问题补充：

The skirt she is wearing today was a birthday present from her mother.

A. this

B. whose

C. what

D. that

答案：

A. this

B. whose

C. what

(答案→)D. that

解析：句意:她今天穿的这条裙子是她妈妈送给她的生日礼物。这里是that 引导的一个定语从句，先行词是the skirt，that 在定语从句中做wear 的宾语。Ａ和Ｃ不能引导定语从句。Ｂ选项的意思是……的。