问题
单项选择题
I’ve come to ask him for the book. That’s why I （） wait until he comes back.
A.need
B.should
C.oughtto
D.have to
答案
参考答案：D
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I’ve come to ask him for the book. That’s why I （） wait until he comes back.
A.need
B.should
C.oughtto
D.have to
参考答案：D