20、 I wonder who was the last ______ the classroom yesterday.

  A. leaving           B. left              C. to leave           D. leave

19、What he has written in Book Two is the same as _______ written in Book One.

  A. it               B. one            C. that              D. those

18、 My teacher told me that 70% of the surface of the earth _______ covered with water.

  A. was             B. were            C. has been          D. is

17、The villager didn’t want to sell the vegetables for _______ he thought was not enough.

  A. what             B. which           C. that           D. how

16、Kite made of paper ______ easily in the weather with rain and strong wind in the sky.

  A. is torn           B. tears            C. is being torn        D. tear

15、It will take us about an hour to get to the airport, _______ possible traffic delay.

  A. allowed for       B. allowing        C. allowed           D. allowing for

14、The desks and chairs in the lab can be _______ to the height of any child.

  A. arranged         B. admitted         C. allowed           D. adjusted

13、 It was twelve o’clock _______ his son came back from the factory.

  A. when            B. that            C. since             D. before

12、--My dog’s really fat.

--You ______ have given it so much food.

  A. wouldn’t         B. couldn’t        C. shouldn’t          D. mustn’t

11、Their efforts were paid off and they were not _______.

  A. in surprise        B. in vain         C. in wonder         D. in order