1. I had him come early.

=> I got him to come early.

2. Waste products from this factory have polluted the river.

=> The river has been polluted by waste products from this factory.

3. If Mary doesn't stay up late, she'll be healthy.

=> Unless Mary stays up late, she'll be healthy.

4. Because he is ill, he can't go to school.

=> Because of his illness, he can't go to school.

5. They had to recycle waste paper so that they saved money and labour.

=> In order to save money and labour they had to recycle waste paper.

6. I didn't arrive in time to see her.

=> I wasn't early enough to see her.

7. The furniture was so expensive that I didn't buy it.

=> The furniture was too expensive for me to buy.

8. They 'll have to change that date of meeting again.

=> The date of meeting again will have to be changed again.

9. John has not had his hair cut for over six months.

=> It's over six months since John last had his hair cut.

10. It was so late that nothing could be done.

=> It was too late to do anything.

i had him come early

=i got....

waste products from this factory have polluted the river

=the river.....

if mary doesn't stay up late, she'll be healthy

=unless.....

because he is ill,he can't go to school

=because of.....

they have had to recycle waste paper so that they saved money and labour

=in order to.......

i didn't arrive in time to see her

=i wasn't early.....

the furniture was so expensive that i didn't buy it

=the furniture was too.....

they 'll have to change that date of meeting again

TRẢ LỜI:

=>

1. I got him to come early.

2. The river has been polluted by waste products from this factory.

3.Unless Mary stays up late, she'll be healthy.

4.Because of his illness, he can't go to school.

5. In order to save money and labour they had to recycle waste paper.

6. I wasn't early enough to see her.

7. The furniture was too expensive for me to buy.

8. The date of meeting again will have to be changed again.

9. It's over six months since John last had his hair cut.

10.It was too late to do anything.