1. The levels of intoxication_______(vary) from subject to subject.

2. Mathematics_______(be) considered as a difficult subject by many students.

3. My mother and my father_______(live) happily since they got married.

4. Nowadays many students_______(like) playing games.

5. Two weeks_______(go) fast when you are on vacation.

6. Tom, together with his friends,_______(want) to join the football team.

7. The teacher as well as her students_______(disagree) with the new rule.

8. Most of the food_______(prepare) by Jane's mother.

9. Most of the students in class_______(get) high scores in the test.

10. Our team_______(be) the best. It has a good chance of winning.

11. There_______(be) a van and two cars in the parking area.

12. Either you or I_______(be) right.

13. Tom and Jerry_______(be) very well known all over the world.

14. Both Jane and Laura_______(cook) for their dinner party at this time yesterday.

15.         Everybody (have) a good time.

16.         John or his brothers (be) going to help me.

17.         There (be) plenty of time.

18.         There (be) a lot of lakes.

19.         The package of cigarettes (be) on the table.

20.         Some of the sugar (was/were) spilt on the floor.

21.         The boxes of candy (be) on the table.

bác hà có hai tấm kiếng hình chữ nhật .chiều rộng của mỗi tấm kính bằng 12chiều dài của nó và chiều dài của tấm kính nhỏ đúng bằng chiều rộng của tấm kính lớn.bắc ghét hai tấm kính vào sát nhau và đặt lên bàn có diện tích 0,9m2 thì vừa khits .Tính diện tích của mỗi tấm kính

4 phần 19 + 5 phần 17=

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