单项选择题
A.No, I‘m not tired. B.Thanks, but I would rather stand. C.Yes, that‘s a good way. D.It doesn‘t matter.
You look（） What（）you（）A.tire；did；doB.tiring；have；doneC....
单项选择题You look（） What（）you（）
A.tire；did；do B.tiring；have；done C.tired；do；do D.tired；have；been doing
You must explain（）how they succeeded（）the experiment.A....
单项选择题You must explain（）how they succeeded（）the experiment.
A.of us；for B.at us；at C.to us；in D.for us；to
We（）every day when we were children.A.used to swimB.use...
单项选择题We（）every day when we were children.
A.used to swim B.used to swimming C.use to swim D.use to swimming
