21、I don’t suppose anyone will volunteer to go, ______?

A．do I         B．don’t I         C．will they            D．won’t they

20、The question that puzzled them is ______ they can get rid of the air pollution in the area．

A．how is it that                             B．that how

C．what is it                           D．how it is that

19、Yesterday evening the board had a discussion regarding ______ they should set up more scholarships to meet the increasing demands．

A．what        B．whether        C．that           D．who

18、I really appreciate ______ to help me out．

A．you for lending me the money                      B．your lending me the money

C．you to lend me the money                            D．it that you lend me the money

17、Hours of playing violent video games can affect the way the brain works, ______ damage to certain cells of brain and slowing brain activity．

A．to cause          B．causing         C．cause           D．caused

16、It is generally accepted that Chinese were the earliest ______ football while the Europeans established the modern rules for football．

A．played              B．playing              C．to play         D．having played

15、The house rent is expensive．I’ve got about half the space I had at home and I’m

paying _______ here．

A．as three times much                            B．as much three times

C．three times as much                            D．much as three time

14、In the survey they listed twelve kinds of food ___would affect the work of the brain．

A．that were believed                             B．which the experts believed

C．the experts believed that                          D．the experts believed

13、But when I got ______ the town ought to have been, all I found was a gas station．

A．where         B．wherever            C．there          D．that

12、---- We did not see him at the lecture yesterday．

---- You ______ him, since I went to an international conference with him．

A．mustn’t have seen                                B．can’t have seen

C．couldn’t see                                        D．needn’t have seen