Trên tia đối tia MA lấy điểm D sao cho MD = MA Xét ΔAMB và ΔDMC, ta có: MA = MD (theo cách vẽ) ∠(AMB) = ∠(DMC) (đối đỉnh) MB = MC (gt) Suy ra: ΔAMB = ΔDMC (c.g.c) Suy ra: AB = CD (2 cạnh tương ứng) và ∠D = ∠A1(2 góc tương ứng) (1) Mà AB < AC (gt) nên: CD < AC Trong ΔADC, ta có: CD < AC Suy ra: ∠D > ∠A2(đối diện cạnh lớn hơn là góc lớn hơn) (2) Từ (1) và (2) suy ra: ∠A1 > ∠A2hay ∠(BAM) > ∠(MAC)

1. What can we do to reduce traffic congestion in big cities?

2. How far is it from your hotel to the train station?

3. It is not very far from my house to school .

4. I think it's time to do something to reduce traffic jams in Vietnam.

5. Mai used to go to school on foot when she was in primary school.

6. There are often traffic jams in rush hour in the city center

7. People didn't use to worry about traffic congestion in the past .

8. It is compulsory to wear a helmet when riding a motorbike in Vietnam.

1.I used to go swimming every Thursday when I was at school .

2.Mai went to school on foot when she was in primary school .

3.How about cycling to the town at the weekend ?

4.It is about 2 kilometers from my house to the nearest bookstore .

5.The hotel is near the airport .

6.How far is it from Madrid to Barcelona ?

7.Make a left turn into Lavalle Street and then go straight ahead .

8.Did you father use to travel to work by car ?

A.1-d ; 2-c ; 3-a ; 4-e ; 5-b 

B.1-c ; 2-b ; 3-d ; 4-c ; 5-a

Question 41.The roads in Vietnam are too narrow to travel easily .

Question 42.How far is it from your house to the bookstore ?

Question 43.Mai used to go to school on foot when she was primary school .

Question 44.It is very important to obey traffic rules when using the road .

Question 45.It is about 10 kilometres from the town to the airport .

Question 46.Two days ago , we were stuck in a traffic jam over 2 hours .

Question 47.Most streets in city centre are congested at rush hour .

Question 48.Did you use to have a tricycle when you was child ?

1.The roads in Vietnam are too narrow to travel easily .

2.How far is it from your house to the bookstore ?

3.Mai used to go to school on foot when she was primary school .

4.It is very important to obey traffic rules when using the road .

5.It is about 10 kilometres from the town to the airport .

6.Two days ago , we were stuck in a traffic jam over 2 hours .

7.Most streets in city centre are congested at rush hour .

8.Did you use to have a tricycle when you was child ?

1.The roads in Vietnam are too narrow to travel easily .

2.How far is it from your house to the bookstore ?

3.Mai used to go to school on foot when she was primary school .

4.It is very important to obey traffic rules when using the road .

5.It is about 10 kilometres from the town to the airport .

6.Two days ago , we were stuck in a traffic jam over 2 hours .

7.Most streets in city centre are congested at rush hour .

8.Did you use to have a tricycle when you was child ?

1.The roads in Vietnam are too narrow to travel easily .

2.How far is it from your house to the bookstore ?

3.Mai used to go to school on foot when she was primary school .

4.It is very important to obey traffic rules when using the road .

5.It is about 10 kilometres from the town to the airport .

6.Two days ago , we were stuck in a traffic jam over 2 hours .

7.Most streets in city centre are congested at rush hour .

8.Did you use to have a tricycle when you was child ?

1.Glenn Close has not won a single Oscar although she has been nominated six times.

2.Brion Stone can not sing talk songs despite being a famous singer .

3.Though some people said the flim was terrible ,I found it quite gripping .

4.It was not frightening at all in spite of being a horror flim .

5.The movie was a box-office failure even though it had an all-star cast .

6.The flim was entirely ignored by awards despite having good reviews .

7.The flim was a commercial succes in spite of criticsm for being too violent .

8.Although i liked it a great deal , I will likely never watch it again .

9.Pen was nominated for Best Actor despite the flim's largely negative recepition .

10.Although critic reviews were favorable , the flim was pulled early from theaters due to low ticket sales .

1.Rio has the most famous carnival in the world .

2.When the festival starts , people gathers in the town square .

3.The festival starts with an opening parade where people walk through the streets.

4.There are more than 2 million people on streets during the carnival in Rio.

5.The main of the samba carnival is the highlight sama parade with two hundred schools.

6.We have parties and other celebrations throughabout the festival.

7.Diwali is the five-day festival of lights celebratedby millions of Hindus across the world.

8.Houses are decorated with candles and colourful lights to celebrate Diwali .