用所给词的适当形式填空。
1. Yesterday, it was ________（rain） heavily.
2. She usually ________（help） her mum ________（do） housework.
3. The day before yesterday, they went to the park . They ________（eat） some apples and ________（drink） some water.
4. Yesterday she ________（be） very happy and we ________（be） happy, too.