1 . We are discussing how to spend the summer holidays now. （同义句转换）
→How to spend the summer holidays____________ now.

2 . In order to stop the air pollution, the government has taken a lot of measures. （同义句转换）
→A lot of measures____________ by the government in order to stop the air pollution.

3 . This set of books are very instructive and ________several times. (be worth)
这套书很有教育意义，非常值得多读几遍。

4 . The university will host an art festival to celebrate its 80th anniversary. （转换成被动语态）
→________________.

5 . People are still cutting down too many trees in that South American country. （转换成被动语态）
→________________.