有几道英语填空题,

有几道英语填空题,
1.My parents are busy working all day.(同义句）
My parents are busy _______ ________ ________ all day.
2.I had a high fever last night.(对had a high fever提问）
what _______ _______ ________ ________ last night?
3.我告诉了他一切,因为在他面前没什么可藏的.
I told him everything because there was nothing to _______ ________ _______.
4.昨天天气炎热,气温30多度
It was hot yesterday,______ _______ _____ _______ _______.