1. When Nam was ten, he spoke English on phone.

2. My sister wrote poems when she was eight.

3. They worried that to some people to use robots is wrose things.

4. If people plant more trees, the area there will be no flood .

5. If we recycle old newspapers we will save a lot of labour of trees .

1. When Nam was ten, he could speak English on the phone.

2. My sister could write poems when she was eight.

3. They worried that some people use robots to do bad things.

4. If people plant more trees, the area there will be no floods.

5. If we recycle old newspaper, we will save lots of labour trees.