How many preblems did you have __those trees last SundayA to plant B planted C planting D plant

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How many preblems did you have __those trees last Sunday
A to plant B planted C planting D plant

选planting 因为 have problems in doing sth是一固定搭配.可以省略介词in.本句中就是这样.意思是:在做某事方面有困难.

选择:C planting
have problems in doing something在某方面遇到问题

C

估计你丢漏单词了,我敢肯定。

C planting
have problems doing sth 做某事有困难

C