matter.trouble.problem.difficulty可数,不可数
网友回答
trouble不可数,
matter ,problem 可数
difficulty 做“困难”解,不可数,做“困难的事”可数
======以下答案可供参考======
供参考答案1:
都可数供参考答案2:
全可数 例句:
There are several important matters we should discuss.
solve a problem
Hhere are some difficulties in reaching an agreement.