---How often do you visit your father in the village?
---I feel ashamed.Just__________.
| A.often | B.by accident | C.once in a while | D.all of a sudden |
Scientists have shown that there is a connection ____ cigarette smoking and certain diseases.
| A.with | B.between | C.to | D.on |
Most of the universities in China provided scholarships for students ______ financial aid. 
| A.in favor of | B.in honor of | C.in face of | D.in need of |
In the experiment the scientist kept a watchful eye________the developments and recorded every detail.
| A.in | B.at | C.for | D.on |
He has some trouble ______ his classmates, but he has no trouble ______ doing his lessons.
| A.with; with | B.in; in | C.with; in | D.in; with |
I bargained with the shopkeeper for a long time, and finally we agreed________the price.
| A.to | B.with | C.on | D.at |