21.Our society has changed and _____ in it.
A.so the people have
B.the people have so
C.so have the people
D.have the people so
22.Parking is a big problem,_____.
A.the traffic is so
B.is so the traffic
C.so the traffic is
D.so is the traffic
23.You never told me you have seen the film,_____.
24.Don't forget to post the letter for me,_____?
25.Not until I came to China ______ what kind of a country she is.
B.I didn't know
C.I did know
D.did I know
26.I don't believe you are a student now,____ you?
27.Do what you think is right,_____ they say.
28._____ is well known,light,like heat,is a form of energy.
29.We can hardly avoid making any mistakes in our work _____ hard we try.
30.They are _____ students that they all performed well in the nationwide examinations.
C.so much diligent
D.such very diligent
31.Young _____ he is,he knows what is the right thing to do.
32.Someone borrowed my umbrella,_____?
33.Nothing dangerous ever happened,_____?
34._____ he objected to your impolite behavior is quite understandable.
35._____ he often forgot their wedding anniversary greatly annoyed his wife.
36.I don't care _____ or not she will apologize to me.
37.Seldom _____ any mistakes during my past five years of service here.
B.did I make
C.should I make
D.would I make
38.Not until the year of 1945 _____ made the capital of this province.
A.the city was
B.was the city
C.when the city was
D.was when the city
39.There used to be some green at this spot,_____?
40._____ is announced in the papers,a nation-wide sport-meeting will be held in the city next month.