1. He is the only one of these men who ___ the inside story.

　　A. knows B. know C. is knowing D. have known

　　2. Eating too much before sleeping ___ good for your health.

　　A. are B. is C. are not D. is not

　　3. The United Nations ____ much to world peace and order.

　　A. has attribute B. have attributed C. has contributed D. have contributed

　　4. Half of the work ___ the student to finish.

　　A. remains B. remains of C. remain to D. remains to

　　5. I ___ them that I think they are making a great mistake.

　　A. told B. will tell C. am telling C. have telling

　　6. The coffee is very cold; it needs ____.

　　A. hot B. to heating C. to be heated D. to be hotted

　　7. The professor was knowledgeable and humorous and ___ with enthusiasm.

　　A. was always listened B. was always listened to

　　C. always was listened D. always listen to

　　8. He returned at midnight and found his house _____.

　　A. had broken into B. was broken in

　　C. to be broken D. had been broken into

　　9. They ___ how to operate the machines.

　　A. are being shown B. are being showing

　　C. were to be shown D. have been showing

　　10. The principal of the university had his secretaries ___ a conference.

　　A. arrange B. to arrange C. arranging D. arranged