Question

I think _______ a foreign language is not easy. You should _______ it often. A. to learn ; to pra

I think _______ a foreign language is not easy. You should _______ it often. A. to learn ; to practice B. learning; practice C. learn; practicing D. learns; to practice 正确答案是B，可是think后面不是应该＋to do sth.么

Answer 1

本题答案为B项。句意：我认为学习一门外语不容易。你应该经常练习。本句补全为：I think (that) learning/ to learn a foreign language is not easy. You should practice it often. 由此可见，think 后为宾语从句，而设空处为非谓语动词作主语，不定式，动名词都可以作主语。第二空should为情态动词，后面需加不带to的不定式，即：动词原形。综上所述答案为B项。

Answer 2

这里是一个宾语从句
i think that learning a foreign language is not easy
因为从句中learning a foreign language 是主语，需要用动名词。