V. WRITING: Rewrite the sentences, keep the meaning unchanged.
1. People speak English as the second language in Singapore.
English
2. We can do this exercise in 5 minutes.
This exercise
: 3. We don't waste paper. We save many trees.
If we
4. "We are having a wonderful time in Da Lat."
Hoa told Tom that
5. It rained heavily all day yesterday, so we didn't go camping.
We didn't
6. It is possible to live on the Moon.
It isn't