单项选择题
A.Perhaps, but I don't have the time.B.He doesn't like our suggestions.C.They've climbed it by now, I think.
A.No，I’m still waiting for the export license to come through.B.No，it has been sent by ship.C.It takes at least 5days by air.
A.Not mine, I'm sure.B.Please try some.C.I'd love that.