题目内容：

求3.倒装、省略、强调结构相关?
倒装、省略、强调结构练习
21.Here _______ now.
A.come David B.David comes C.David came D.comes David
22.______ that you were ill,I would have come home earlier.
A.I had known B.If I know C.Had I known D.If I have known
23.__ to eat when the telephone rang.
A.Scarcely had I sat down B.Scarcely I had sat down
C.I sat down scarcely D.Scarcely that I sat down
24.____ pay for the damage.
A.On no circumstances you should B.Under no circumstances you should
C.On no circumstances should you D.Under no circumstances should you
25.___,she is not yet ready to turn professional.
A.As she is talented B.She is as talented
C.Talented as she is D.Talented as is she
26.______ anything,please don’t hesitate to contact me.
A.Should you ever need B.Ever should you need
C.You should ever need D.You ever should need
27.She never laughed,______ ever lose her temper.
A.so did she B.but she did not C.nor did she D.nor she did
28.John wasn’t at the meeting and _____.
A.either was his assistant B.neither was his assistant
C.neither his assistant was D.either his assistant was
29.David remembered a lot more about our teachers than ____.
A.I did about them B.I do about them C.me about them D.I remember about them
30.It was not until he arrived in class ____ realized he had forgotten his book.
A.when he B.but he C.that he D.and he