按要求改写下列句子。

1. Lily watered the flowers this morning.  (用at 6:00 this morning改写)

    Lily _____ _____ the flowers at 6:00 this morning.

2. We should look after the encouraged animals.  (改为同义句)

    We should _____ _____  the encouraged animals.

3. They feed the tigers twice a day.(就画线部分提问)

    _____ _____ do they feed the tigers?

4. We should clean the zoo as often as we can.  (改为被动语态)

    The zoo_____ _____ _____ by us as often as we can.

5. We are for building a primary school in the village.  (改为同义句)

    We _____ _____ build a primary school in the village.