36. Scientists are convinced ______the positive effect of laughter _____physical and mentalheath.

　　A. of, at B. by, in C. of, on D. on, at

　　37. This problem is difficult to________.

　　A. deal B. dealt C. deal with D. dealing with

　　38. I have ______all my papers but I still can’t find my notes.

　　A. looked through B. looked for

　　C. looked after D. looked out

　　39. ----You are always full of _______. Can you tell me the secret?

　　----Taking plenty of exercise everyday.

　　A. power B. strength

　　C. force D. energy

　　40. This picture ______ me of my childhood.

　　A. calls B. remembers

　　C. thinks D. reminds

　　41. He told me the news in the ____of a letter.

　　A. way B. mean C. method D. form

　　42. Some students often listen to music ______classes to refresh themselves.

　　A. between B. among C. over D. during

　　43. His father died ____cancer last year and he missed him very much.

　　A. of B. from C .with D. or

　　44. He was wearing dark glasses _____his eyes ______the sun.

　　A. protect; from

　　B. protecting; against

　　C. to protect; from

　　D. protected; against

　　45. Don’t be ______by products promising to make you lose weight quickly.

　　A. taken off B. taken out C. taken away D. taken in

　　46. They reached home at last, ____and hungry.

　　A. was tired B. tired C. tiring D. tiredly

　　47. Washington, a state in the United States, was named _________one of the greatest American presidents.

　　A. in honor of B. instead of

　　C. in favor of D. by means of

　　48. Over-heating development might have had bad ___on the national economy.

　　A. cause B. influence C. result D. factor

　　49. I happened _______it in some book.

　　A. to read B. to have read C. that I have read D that I had read

　　50. _______other good students, the teacher thinks, Hank is ____student.

　　A. Compared with; a most satisfied

　　B. Compared to; the most satisfied

　　C. Compared to; the more satisfying

　　D. Compared with; a more satisfying

　　参考答案：

　　1—5 DCCAD 6—10 CDABC

　　11—15 BCDBA 16—20 CACBA

　　21—25 CBDAB 26—30 CBBDC

　　31—35 CDBCC 36—40 CCADD

　　41—45 DAACD 46—50 BABBD