(2013·济南一中模拟)After graduation, Frank often thought of those who had helped him ________ his school life

You will _______ your health ifyou work so hard，eat a little food and sleep badly．

It was notuntil she had arrived home _______ her appointment with the doctor.

I promise Shirley get a new iPad on her birthday.— Will it be a big surprise to her

Unless everyone ________ actions to stop pollution, the environment problem may become worse.