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
单项选择题 We（）the bathroom and plan（）the bedroom this year.
单项选择题 One of the benefits of the new model is that it is easier（）than the old one.
单项选择题 What（）of blood does Tom have?
