根据句意用所给动词的适当形式填空。

小题1:How do you like our city? Wonderful. I ___(stay) here for another two days.

小题2:Everyone in our class except the twins ____ (hope) to visit the Great Wall.

小题3:He won’t go camping next week because he is busy ______( study) for exams.

小题4:No smoking here . Oh, sorry. I ______ ( not see ) the sign.

小题5:I think every one of them  ________(solve) the maths problem at the moment.

小题6:The people in the northern part of China often make fires ____ (keep) warm.

小题7:Could you tell me when ______ (leave) for New York?

小题8:If you ______(not be ) careful, you will make mistakes.

小题9:There ______( be) an interesting film tonight, is there?

小题10:Look! There is a wallet _______ (lie) on the ground.

下列哪种情况常是一过性视力丧失（）

A.视锥细胞变性

B.Stargardt病

C.视网膜中央动脉痉挛

D.急性闭角型青光眼

E.视网膜脱离