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
单项选择题 Mr. Baker, a dozen students want to see you. （） they wait here or outside?
单项选择题 I （） help. I can do it myself.
单项选择题 Since the road is wet,（） last night.
