Cho \(\Delta ABC\), trung tuyến AM. Gọi G là trọng tâm của \(\Delta ABC\). Qua G kẻ các đường thẳng song song với AB và AC, cắt BC theo thứ tự D và E
a) Tính và so sánh các tỉ số \(\frac{BD}{BM}\) và \(\frac{CE}{CM}\) từ đó suy ra BD = CE
b) C/m: BD = DE = CE
Combine each pair of sentences into a new one, using –ing or –ed participles.
1. The house belongs to my uncle. It is built of wood.
2. The picture won the first prize in the art contest. It was taken by his brother.
3. The girl is intelligent. She sits next to me.
4. The boy ismy neighbor’s son. He is playing in the front yard.
5. The man was taken to the local hospital. He was injured in the accident.
6. The musician is internationally famous. He appeared in the concert last night.
7. All the people can speak French and English. They live in this village.
8. The trousers are too long for me to wear. THey were made by the tailor in our street.
9. The woman was very interested in our project. She spoke to me on the phone.
10. The book is about places of interest in Viet Nam. It was written by Mr. Jones.
Supply the correct participles of the verbs in brackets.
1. The plays (write)……were written…….by Shakespeare are still loved by millions of people.
2. The buses (run)…run…along this route are all new.
3. The bags (hang)……….on the wall are our team’s.
4. She wore a skirt (make)………………..cotton.
5. The singer (perform)………………….on TV last night is my favorite one.
6. The man (talk)………………..to your teacher is my uncle.
7. The boys (play)…………………soccer in that field are our friends.
8. Dairy products (sell)…………………in this shop are safe for our health.
9. The cars (make)………………….in Japan are very economical.
10. The old lady (stand)…………………in front of our house is our grandmother.
11. The students are copying the words (write)…………………on the blackboard.
12. The trees (stand)……………….near the school gate have big branches.
13. The story (tell)………………..by the teacher is interesting.
14. The students discussed the problems (cause)………………..by pollution.
15. A person (watch)………………..television is called a television viewer.