题目内容
I really can't understand ________ about such a serious matter.
- A.you to joke
- B.you joke
- C.why joke
- D.your joking
D
在动词understand之后要用动名词作宾语.your joking在此是动名词的复合结构.
在动词understand之后要用动名词作宾语.your joking在此是动名词的复合结构.
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