Trong bài thơ" Một khúc ca xuân" nhà thơ Tố Hữu đã viết:

"Đã là con chim, chiếc lá

Thì con chim phải hót, chiếc lá phải xanh

Lẽ nào vay mà không có trả

Sống là cho, đâu chỉ nhận riêng mình".

Cùng quan điểm đó Nguyễn Thành Long đã xây dựng thành công nhân vật anh thanh niên trong truyện ngắn"Lặng lẽ SaPa" từ vẻ đẹp của nhân vật này em có suy nghĩ gì về thanh niên hiện nay.

PRONUNCIATION

Chọn từ có phần gạch chân được phát âm khác với những từ khác

1. a.Scream b.death c.ready d.peasant

2. a.traveled b.started c.landed d.seemed

3. a.chat b.panic c.park d.passenger

4. a.frightening b.brigade c.pilot d.fire

5. a.technology b.teaching c.purchase d.lunch

6. a.chance b.teaching c.chemistry d.children

7. a.hard b.start c.party d.talk

8. a.son b.sunshine c.above d.woman

9. a.polite b.literature c.guide d.kind

10. a.great b.teacher c.street d.receive

11. a.father b.education c.background d.career

12. a.private b.shy c.hard d.rare

13. a.brilliant b.tragic c.hatred d.mature

14. a.death b.year c.receive d.teacher

15. a.prevent b.grade c.determine d.english

Doctors say that regular aerobic exercise leafs to a healthier heart. Jogging,(1)..........., riding a bicycle, and other aerobic exercises lower the risk of heart disease. In one kind of heart disease, fatty stuff called plaque builds up in blood vessels(2)..........to the heart. Aerobic exercise helps prevent this build up> Aerobic exercise also(3)..........the heart and lúng stronger.

Doctors say you(4)............do 20 to30 minutes of aerobic exercise at least three times a week. You need(5).........hard enough to get your heart beating. You can use two fingers to feel a beat, or pulse, in your wrist or neck.

1. A.walking B.walk C.walks D.walked

2. A.which goes B.that going C.whcih to go D.going

3. A.made B.makes C.making D.make

4. A.would B.must C. should D.have to

5. A. to exercise B.exercising C.exercise D.exercised

Ex1:

Nowadays people are more aware that wildlife all over the world is in danger. Many species of animals are threatened, and could easily become(1)..........if we do not make an effort to protect them. There are many reasons for this. In some cases, animals are hunted for their fur or for other valuable parts of their bodies. Some bird, (2)............as parrots are caught alive and sold as pets. For many animals and birds, the problem is that their habitat the place where they live is disappearing. More(3)......... is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them groww better crops, but these chemicals pollute(4)..........the environment and harm wildlife. The most successful animal on earth-human beings will soon be th only ones left, (5)...........we can solve this problem.

1. A.extintct B.lost C.empty D.disappeared

2. A.such B.where C.like D.or

3. A.area B.earth C.land D.soil

4. A.the B.that C.an D.a

5. A.because B.however C.if D.unless

Ex2:

Although most families in the United States enjoy a high living standard, many Amerrican women have to work(1).......... at home and in their offices. Despite their husband's (1)..........of the housewwork, women have to do most of the housekeeping tasks. In single-parent families, the mothers may not have (3)..........children to take care of, but they have to raise their families alone and have to provide for all the housekeeping money. Therefore, the (4)..........mothers have to work very hard to earn their living. More over, in spite of the fact that the single mothers have all the (5).........conveniences at their homes, they find that bringing up their teenage children alone is not easy

1. A.hardly B.hard C.fast D.equally

2. A.share B.need C.refusal D.responsibility

3. A.few B.much C.many D.some

4. A.dependent B.lonely C.alone D.single

5. A.expensive B.saving C.comfortable D.modern

Ex3:

Doctors say that regular aerobic exercise leafs to a healthier heart. Jogging,(1)..........., riding a bicycle, and other aerobic exercises lower the risk of heart disease. In one kind of heart disease, fatty stuff called plaque builds up in blood vessels(2)..........to the heart. Aerobic exercise helps prevent this build up> Aerobic exercise also(3)..........the heart and lúng stronger.

Doctors say you(4)............do 20 to30 minutes of aerobic exercise at least three times a week. You need(5).........hard enough to get your heart beating. You can use two fingers to feel a beat, or pulse, in your wrist or neck.

1. A.walking B.walk C.walks D.walked

2. A.which goes B.that going C.whcih to go D.going

3. A.made B.makes C.making D.make

4. A.would B.must C. should D.have to

5. A. to exercise B.exercising C.exercise D.exercised

Ex1: V-ing/to V

1.Shh! i hear someone.......in the distance.Do you hear it too?

a. shout

b. shouted

c. to shout

d.shouting

2. are you looking forward.........on your cassation?

a. you go

b. going

c. to going

d.to go

3. it was a nice day so we decided..........for a walk

a. going

b. go

c. to go

d. to went

4. go on ............ the other exercise after you have finished this one

a. to do

b. doing

c. do

d. to doing

5.i usually avoid.......party

a. going

b. go

c. to go

d. to going

6. Hoa and Lan stopped.........to each other when the teacher came to them

a.to talk

b. talked

c. talking

d. talks

7. They were tired so they suggested............to bed early

a.go

b. to go

c. going

d. gone

8. it took us an hour and a half .............. to Vung tau

a. drive

b. driving

c. to drive

d. drove

9. Ms Lan enjoys...........because she loves working with children

a. to teach

b. teach

c. teaching

d. to teaching

10. you shouldn't spend all your time..........

a. study

b. to study

c. studying

d. studied

11. would you like..........somewhere for a rest?

a. going

b. to go

c. go

d. to be gone

12. could you please stop.......... so much noise

a. making

b. to make

c. make

d. to making

13. i'm not in a hurry. I don't mind................

a. waiting

b. waited

c. to wait

d. to waiting

bài 1. thì của động từ

1. The house was very quiet when i hot home. Everybody.........to bed

a.have gone

b.went

c.had gone

d.goes

2. he always..........for a walk in the evening

a.go

b.is going

c.goes

d.going

3.in 1660, Issac Newton.........to Cambridge University

a.went

b.has gone

c.had gone

d.goes

4.the World War II ............in 1939 and...........in 1945

a.begins/ends

b.had begun/ended

c.has begun/had ended

d.began/ended

5.we've had just finished dinner when they..............

a.come

b.came

c.had come

d.coming

6.My friends.........a great time in Nha Trang last year

a.have

b.has

c.had had

d.had

7.when john and i got to the theatre. the movie...........

a.started

b.starting

c.had started

d.starts

8.every day, i............to school by bike but today i go to school by motorbike

a.goes

b.went

c.go

d.going

9.there.............animals in the circus

a.is

b.are

c.was

d.be

10.i........ go to school last sunday

a.don't

b.didn't

c.doesn't

d.won't

bài 1. giới từ

1. peter is very good at painting. he harbours the dream ........... becoming a famous artist

a.to b.at c.with d.of

2. Marie curie received general education..........local school

a.at b.on c.in d.for

3. i have to save money............a study tour abroad next year

a.to b.for c.in d.on

4.what lesson does Quan have............7:15 a.m..........Monday?

a.at/on b.in/on c.by/in d.on/in

5. the farmers often chat.........their work, their children and their plan for the next crop at teatime

a.about b.at c.with d.of

6. Mr Lam iss a cyclo driver. He has to work from 7 a.m to 6 p.m so he never has lunch.........his family

a.with b.for c.in d. on

7. are you contented..........your present job, Mrs Tuyet ?

a.to b.for c.with d.of

8. i think you don't have to worry...........your weight

a. at b.about c.with d. to

9. it was 2 week before chrismast and the mall was crowded............shoppers

a.with b.for c.to d.by

1 đoạn phân tử ADN có chiều dài 5100å có số Nu loại A=900

a, tính số lượng Nu của đoạn ADN đó

b, tính M=? số lượng từng loại A,T,G,X

c, tính số liên kết hóa trị và hidro