题目内容：

根据句意，用括号内所给单词的准确形式填空：

1.My father always goes running in the park _______(one) a week.

2.Mum, could you help me cut the apple into two ___________(half)?

3.At weekends, I often go to my __________ (grandparent) home to visit them.

4.Should we eat ________ (little) meat and eat more fruit and vegetables？