gave 解析:and前and后的时态要一致
to sleep 解析:固定搭配 it is necessary to do sth 做..很有必要
enjoy 解析:放在will后,用动词原形
She picked it up and gave it back to her mother.
It's necessary to sleep nine hours a night.
I hope(that) you will enjoy your holidays
gives
to sleep
enjoy
gave,
to sleep
enjoy