单选题 I have decided to act on his suggestion that I __ eat less sugar and salt.

题目

单选题 I have decided to act on his suggestion that I __ eat less sugar and salt.
A have to
B shall
C should
C am going to
答案是should ,为什么用shall 不可以?

答案

suggestion 引导的从句 必须是 should+动词原形 这是固定的搭配
记住就行了
其中should 可以省去