从每小题的四个选项中，选出最佳的一项，并把它前面的大写字母填入左面的括号里。
( ) 6. Wet umbrellas are not allowed ( ) into the hall.
A. to be taken B. to take C. taken D. taking
( ) 7. ( ) his party to power for the fourth time, he becomes famous among Western
leaders.
A. Lead B. Leading C. Have led D. Having led
( ) 8. ( ) is still unknown when the president is going to make a public speech.
A. Which B. That C. It D. What
( ) 9. This is the only English-Chinese dictionary( ) could be found in the teachers'
reading-room.
A. what B. which C. it D. that
( ) 10. Some of his suggestions had been rejected ( ) they were quite impracticable.
A. as B. when C. until D. if
( ) 11. It ( ) light in the evening until about seven o'clock. Then it suddenly got dark.
A. falls B. grows C. stays D. goes
( ) 12. They studied the ( ) of the science in the developing countries and found they were
backward.
A. agreement B. equipment C. development D. movement
( ) 13. His hands ( ) a little as he took up a pen and began to write.
A. waved B. shook C. raised D. lifted
( ) 14. Children's teeth should be( ) twice a year or more often.
A. looked B. seen C. watched D. examined
( ) 15. It ( ) him all his life to write this new history of the world.
A. paid B. spent C. took D. needed
( ) 16. You should never ( ) an electric wire to a water pipe.
A. connect B. unite C . return D. get
( ) 17. Will you take it to your room and( ) them safe? I'll come and take them soon.
A. set B. consider C. keep D. get
( ) 18. I could see that she was( ) for everything to be settled.
A. anxious B. worried C . troubled D. hopeful
( ) 19.She shouldn't laugh so ( ) there. She drew too much attention.
A. big B. high C. loud D. aloud
( ) 20. What was there to be( ) ? Nothing at all. It is quite bright outside now.
A. afraid of B. angry with C. ready for D. surprised at