He ______ the math problem, his classmates wanted to help him out.
It is none of your business ______ other people think about you.Believe yourself.
---Come on, please give me some ideas about the project. --- Sorry.With so much work ______ my mind, I almost break down.
With the good care taken by doctors and nurses, many patients are beginning to _________.
--- I have got a headache. ---No wonder you _________ in front of that computer too long.
Water can absorb and give off a lot of heat without big changes in temperature, thus creating a ______ environment.