3. Jack made his sister tidy up his bedroom.(改为被动句) 

His sister     up his bedroom by Jack.

2. Alice saw something strange in the sky.(改为一般疑问 句) 

    strange in the sky?

1.We read some articles on keeping pets last month.(改为否定句)

We   articles on keeping pets last month.

2. 长隆大马戏再过半小时就要开始了，请尽快买一张票。

The Chimelong Circus will begin in half an hour. Please buy a ticket     .

1. 他年纪大了，不能频繁出游。

He is unable to travel frequently   his old age.

9. 现在很难看见这种动物生活在野生环境中了”

Now it is difficult to see this kind of animal living   .

10. 1 looked back over my (肩膀) and saw a man watching me.

9. He gave me a (警告) that if I didn’t clean the floor,he would beat me.

8. The young lady asked the children not to play with (剪刀) .

7. 1 don't think he will have enough (勇气) to do the work.