Muốn cho văn bản thuyết minh được sinh động hấp dẫn, có thể sử dụng một số biện pháp nghệ thuật nào?

Khi nào dòng điện cảm ứng xuất hiện trong vòng dây cảm ứng?

Làm cách nào để thay đổi từ tính của nam châm điện?

1. Use fresh economically, or there will be a shortage of water in a few decades.

=> If you don't........,there will be a shortage of water in a few decades.

2. The bus was late, so Lan was late for school

=> Lan was late for......was late.

3. "Let's keep the air unpolluted", the Town President said.

=> The Town President suggested that.........the air unpolluted.

4. I like painting.It is in this room

=> I like the painting.......room.

1. If it....(not,be) warm this afternoon, we....(put off) the game.

2. Your father....(pick) ypu up if you....(come) back late?

3. What you....(speak) if you....(meet) a foreigner?

4. Unless he....(answer) all my questions, I....(not,help) him.

5. Study hard or you will get bad marks

--> Unless

1. If she....(work) hard, she....(pass) the exam.

2. If I....(come) soon, I....(phone) you.

3. She....(feel) sad if you....(not,give) have a gift.

4. If Peter....(go) to work late again, he....(be) sacked.

5. No one....(know) the truth if you....(not, reveal).

6. If the boy....(eat) that apple, he....(be) ill.

7. If you....(not, hurry), you....(miss) the bus.

8. Tell him about this story if you....(see) him.

9. If you....(have) a day off where you....(go)?

10. If he....(cook) the meal himself, help him.

11. If few people....(come) to the meeting, postpon to the other day.