根据句意用所给动词的适当形式填空。
How do you like our city? Wonderful. I ___(stay) here for another two days.
Everyone in our class except the twins ____ (hope) to visit the Great Wall.
He won’t go camping next week because he is busy ______( study) for exams.
No smoking here . Oh, sorry. I ______ ( not see ) the sign.
I think every one of them  ________(solve) the maths problem at the moment.
The people in the northern part of China often make fires ____ (keep) warm.
Could you tell me when ______ (leave) for New York?
If you ______(not be ) careful, you will make mistakes.
There ______( be) an interesting film tonight, is there?
Look! There is a wallet _______ (lie) on the ground.