With the level of haze ______ greatly, many people work to ______ public awareness of environment protection.

Would you consider ____your homework first before you go to the cinema? [ ]

Thank you very much. Without your help we ______ car started.

It took me quite a long time to develop a voice, and _______ I have it, I am not going to be silent

I’m not the man ________the phone. She asked for Henry. — I’m sorry I was mistaken.