Việc thông thương qua lại giữa nước ta với các nước láng giềng chỉ có thể tiến hành thuận lợi ở một số cửa khẩu, vì:

A. thuận tiện cho việc đảm bảo an ninh quốc gia.

B. phần lớn biên giới nước ta nằm ở miền núi.

C. phần lớn biên giới chạy theo các đỉnh núi, các hẻm núi...

D. là nơi có địa hình thuận lợi cho qua lại

Những thay đổi về kinh tế đã tạo ra những giai cấp, tầng lớp mới nào?

1. A. late B. gate C. hilarious D. hate

2. A. house B. hour C. horrible D. horror

3. A. fight B. religious C. sight D. light

Hình như đề bài có sai sót. Mình sửa lại luôn nhé bạn.

1. Chi has long black hair.

=> (-) Chi doesn't have long black hair.

=> (?) Does Chi have long black hair?

2. Miss Lan goes to work by bus.

=> (-) Miss Lan doesn't go to work by bus.

=> (?) Does Miss Lan go to work by bus?

3. His nose is small.

=> (-) His nose isn't small.

=> (?) Is his nose small?

4. They have brown eyes.

=> (-) They don't have brown eyes.

=> (?) Do they have brown eyes?

5. He watches television every night.

=> (-) He dowsn't watch television every night.

=> (?) Does he watch television every night?

x² = 16

=> x² = ( 4 )²

=> x = 4 hoặc x = - 4

x² = 16

=> x² = ( \(\pm\)4 )²

=> x = 4 hoặc x = - 4

1.Quynh and Nga work in the city center

-> Where do Quynh and Nga work?

2.There is a swimming pool near Tuong's house

-> What is there near Tuong's house?

3.Our family are going on holiday by car

-> How are your family going on holiday?

4.Mrs.Huong and her husband are going to stay in Ha Long for one week

-> How long are Mrs. Huong and her husband going to saty in Ha Long?

5.Our new classmates usually get up at five in the morning because they live far from our school

-> Why do your new classmates usually get up at five in the morning?

1.My new English-Vietnamese dictionany is very thick and useful

->I find my new English - Vietnamese dictionary very thick and useful.

2.Those students ride their bicycles to their universities every morning

->Those students go to their universities by bycicles every morning.

3.Let's sing an English song!

->How about singing an English song?

4.No one in our class is more intelligent than Nhu Quynh

->Nhu Quynh. is the most intelligent student in our class.

5.Mr.Pike is a very strict teacher of English

-> Mr. Pike teaches English very strictly

6.My's house is to the right of the post office

->The post office is to the left of My's house.

7.Viet's brother likes drinking cocacola

->Cocacola is Viet's brother' s favourite drink.

8.I am interested inn cartoons

->I enjoy watching cartoons.

9.What's the height of Mount Phanxipang?

->How high is Mount Phanxipang?

10.These girls are very intelligent

->These are very intelligent girls.

1. The pupils study hard. Their parents pay much attention to their school work.

=> The pupils whose parents pay much attention to their school work study hard.

2. The author is an American. You are reading book.

=> The author whose book you are reading is an American.

3. The woman feels happy. Her husband has just won a big prize.

=> The woman whose husband has just won a big prize feels happy.

4.I will tell you about the boy. You met his parents last night.

=> I will tell you about the boy whose parents you met last night.

5. Do you know the woman? Her daughter has won the contest.

=> Do you know the woman whose daughter has won the contest.

I like the house. Its walls were made of glass.

=> I like the house whose walls were made of glass.

2. I read about the child. His life are saved by her pet dog.

=> I read about the child whose life are saved by her pet dog.