12.At first the speaker was referring to the problem of pollution in the country,but halfway in her speech,she suddenly to another subject. A.committed B.switched C.favored D.transmitted 13.There are other problems which I don't propose to at the moment. A.go into B.goaround C.go for D.goup 14.A love marriage,however,does not necessarily much sharing of interests and responsibilities A.take over B.result in C.hold on D.keep to 15.I'm not sure whether I gain any profit from the investment.soI can't make a(n) promise to help you A.exact B.defined C.definite D.sure 16.Mary's score on the test is the highest in her class,she have studied very hard. A.may B.should C.must D.ought to 17.I have tow boys butof them likes sweets. A.both B.neither C.either D.none 18.They will have it finished in A.three quarter ofan hour time B.three quarters of an hour time C.three quarter of an hour'stime D.three quarters of an hour'stime 19.I shall have a companion in the house after all these years. A.single B.sole C.alone D.lonely 20.None ofthe servants were when Mr.Smith wanted to send a message A.available B.approachable C.attainable D.applicable 21.What he said just now had little to do with the question discussion. A.on B.in C.under D.at 22.We need a chairman A.for whom everyone has confidence B.in whom everyone has confidence C.who everyone has confidence of D.Whom everyone has confidence on12. At first the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly _ to another subject. A. committed B. switched C. favored D. transmitted 13. There are other problems which I don’t propose to _ at the moment. A. go into B. go around C. go for D. go up 14. A love marriage, however, does not necessarily _ much sharing of interests and responsibilities. A. take over B. result in C. hold on D. keep to 15. I’m not sure whether I gain any profit from the investment, so I can’t make a(n) _ promise to help you. A. exact B. defined C. definite D. sure 16. Mary’s score on the test is the highest in her class; she _ have studied very hard. A. may B. should C. must D. ought to 17. I have tow boys but _ of them likes sweets. A. both B. neither C. either D. none 18. They will have it finished in _. A. three quarter of an hour time B. three quarters of an hour time C. three quarter of an hour’s time D. three quarters of an hour’s time 19. I shall have a companion in the house after all these _ years. A. single B. sole C. alone D. lonely 20. None of the servants were _ when Mr. Smith wanted to send a message. A. available B. approachable C. attainable D. applicable 21. What he said just now had little to do with the question _ discussion. A. on B. in C. under D. at 22. We need a chairman _. A. for whom everyone has confidence B. in whom everyone has confidence C. who everyone has confidence of D. Whom everyone has confidence on