英语句子合并和改同义句

楼上第三题都错啦！

1.A house may fall down in an earthquake.It’s built on sand.(合并为一句)
=A house (which/that is built ) on sand may fall down in an earthquake.

2.It’s harmful for both adults and children to smoke.(改为同义句)
=(Smoking is) harmful to both adults and children.

3.The mistakes she made in her homework were not as many as yours.(改为同义句)
=She made (fewer) mistakes in her homework (than) you did.

1.Which is built
2.Smoking is
3.few,than

1. A house which is built on sand may fall down in an earthquake.

2. Smoking is harmful to both adults and children.

3. She made less mistakes in her homework than you did.

1.which is built
2.Smoking is
3.fewer than