Cho đường tròn (O) đường kính AB. Vẽ tiếp tuyến của đường tròn (O) tại điểm C cắt tia oi tại điểm D 

a)chứng minh OI song song BC

b)chứng minh DA là tiếp tuyến của đường tròn (O)

1.mary regetted not asking you for advice.

=>mry wishes

2. I am sorry I don't have time to come and help you with your homework.

=>I wishes

3. "What were you doing when is phone you last night ?"he said

=>he asked me

4. "don't put off your work till tomorrow,"he said to me.

=>he told

5."why have you turned off the television?"ellen said me.

=>ellen asked me

6."do you like go camping?"he asked me.

=>he asked me

7.they will have to answer the question again

=>the question

8.the pupils sent the letters to their old teachers yesterday.

=>the letters

9. she bought the watch at the shop.

=>the watch

1. Affected by the western cultures, Vietnamese young people's attitudes toward love and marriage have ........ changed(DRAMA)

2. We had a marvelous holiday and our trip to paris was ...........,so we would like to visit it again.(FORGET)

3. That man, who usually uses scientific knowledge to solve practical problems, is a good........(TECNOLOGY)

4. Human being should take action together to prevent the........of rare animals and protect the environment. (APPREAR)

giúp mik

1. "I'am sory I damaged your tape recorder, Mike,"said Bob.(apologized)

=>

2. they would like to build a new hause instead of repairing the old one. (would rather )

=>

3. the match was so boring that all the fans didn't want to watch it. (such)

=>

4. She turn down the radio. She didn't want to disturb the neighbors. (in order that)

=>

viết lại câu

giúp mình

People say that three man with guns robbed the bank yesterday.(said)