单项选择题
A.to play on B.to have played C.playing on D.to being played on
（）,we keep records on all the experiments so that we ma...
单项选择题（）,we keep records on all the experiments so that we may have enough.
A.As a whole B.As a rule C.On the average D.by all means
We（）the bathroom and plan（）the bedroom this year.A.pain...
单项选择题We（）the bathroom and plan（）the bedroom this year.
A.painted;topaint B.ispainting;painting C.paint;topaint D.have painted;to paint
One of the benefits of the new model is that it is easi...
单项选择题One of the benefits of the new model is that it is easier（）than the old one.
A.operating B.to be operated C.to operate D.operated
