Question

问一道英语选择题

The idea that a college student _______ at least one foreign language has been well accepted.
a. learn
b. learns
c. learnt
d. must learn
选哪个？为什么？3q

Answer 1

选 A。 此处不是定语从句，而是同位语从句。 The idea , the suggestion, 等词引导的从句后面其实是省略了 should ， 原句应该是 The idea that a college student （should) learn at least one foreign language has been well accepted.

Answer 2

a. learn
这是idea的同位语从句，要用虚拟语气，should+动词原形。learn前面省略了should

Answer 3

个人认为应该选B。因为a college student learns at least one foreign language 用来解释The idea 定语从句。a college student 意思是一个大学生为单数，故应选B

Answer 4

B
首先这是一个同位语从句，主句部分是The idea has been well accepted.
（这个主意已经被大家接受）。而从句部分是 that a college student _______ at least one foreign language，它是解释 The idea 的。意思是每一个大学生应该至少学一门外语。因为这一句话类似于客观事实，所以只要根据主谓一致选择动词得第三人称形式就好。
看明白了么？