单项选择题
A.No, you can't do it B.Sorry, but you may not C.Well, I am afraid I am going to use it myself D.Of course not. I'm going to need it myself
May I ask you a question?（）A.Yes. you need B.Yes. ...
单项选择题May I ask you a question?（）
A.Yes. you need B.Yes. ask C.Yes. please D.Let me see
Mathematics（）study or science of numbers.A.is B.are ...
单项选择题Mathematics（）study or science of numbers.
A.is B.are C.was D.were
Mary told me that she（）to the supermarket before coming...
单项选择题Mary told me that she（）to the supermarket before coming home
A.went B.had gone C.has gone D.goes
