C. No, you’d better not

　　D. Of course, go ahead

　　39. It is required that all traffic participants should

　　the traffic rules to make traffic safer and faster.

　　A. perform

　　B. observe

　　C. support

　　D. possess

　　40. --- The terrible accident is under investigation

　　--- Actually, quicker action

　　those workers trapped in the mine.

　　A. might have saved

　　B. must have saved

　　C. could have saved

　　D. should have saved

　　41. --- Which of these two magazines will you take?

　　--- I’ll take

　　, in case the journey is boring.

　　A. all

　　B. either

　　C. both

　　D. neither

　　42. My father and my mother have been married for 30 years, and never once

　　with each other

　　A. have they quarreled

　　B. they have quarreled

　　C. did they quarrel

　　D. had they quarreled

　　43. I’ll never forget the days

　　I learn hard in my senior high school,

　　changed my whole life.

　　A. that; which

　　B. when, which

　　C. which, when

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