Don’t do such things ______ you are not sure about.

　 A. as　 B. that　 C. what　 D. than

It’s a mistake to think of Florida only 　　　 (从……方面) its tourist attractions.

They will bring in a new project which 　　　　 a lot of money.

A. calls for　　　　 B. calls on　　　　 C. calls at　　　　 D. calls up

I can’t imagine_____ that with such a famous author.
A. work      B. to work   C. to be working    D. working

He spent about 200 yuan ____________ in chatting on phone this month.