He has some problems

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固定搭配是：
have problems (in) doing sth.
in可以省略
没有in doing
所以选择A有问题继续问,
希望能够帮到楼主哈~
======以下答案可供参考======
供参考答案1:
have problem in doing sth，in 可以省略。
所以应该选A
意思是做某事有困难，欢迎追问