句型转换。

1. Good food and exercise help us to study better.(就画线部分提问)

   _______ ________ you to study better?

2. Ann is usually at her uncle's home on Sundays.  (就画线部分提问)

   _______ _______ _______ Ann at her uncle's home on Sundays?

3. I always exercise after school.(变成完全否定句)

    I_______ exercise after school.

核桃的成熟为8～10月，外有木制硬壳，里面是供食用的果仁。（）