题目：
Employees who believe they are eligible should let their managers know _______
they would like to apply for a pay raise.
A)that
B)how
C)if
D)who
答案为C,但我个人是选A
空格后是完整句 所以删除D 另外B语意不通也删除
而我想说if是“是否”的意思 放进去解释好像很奇怪 所以选A
想请教一下各位这题是为何呢？
感激不尽