I saw Jack yesterday. He told me that he would stay here _____ the end of this year.

A. at 　　                 B. by 　　                    C. for 　　           D. till

Does John know any other foreign languages ____ French?

A. except          B. but                                C. besides             D. beside

We walked ____ the Tian An Men Square to the Museum of Chinese History.

A. across                 B. through       C.by             D.past

I don' t think Xiao Li is ____ the other students ____ mathematics.

A. after, on        B. after, with C. behind, in     D. behind, at

The accident is reported to have occurred __________ the first Sunday in February.

      A. at                B. on                C. in                   D. to

___ he has finished writing the novel is unknown. 

A. If                                  B. Whether                     C. When                         D. While

___ he did it remains a secret.            

A. What       B. Whom       C. Which       D. How

The scientist is well known us his great achievement．

A．to；for B．by；for C．by；as D．to；in

We didn’t live together. We kept in touch _______ writing often.

A. with    B. of  C. on     D. by

He ran off____ I could stop him.

A. before             B. after          C. since          D. when