题目内容：

Do you have any___with your studies?
A difficulty B difficulties

优质解答

A.difficulty 可以是可数（表示具体）也可以不可数名词（表示抽象）.如：
have difficulty in doing / with sth.做……有困难.表示抽象,用不可数
come across difficulties/ overcome difficulties 表示具体困难,用可数.