—How long has John been here?— Two years he still has no friends.A. andB. soC. butD. or

问题补充：

—How long has John been here?

— Two years, he still has no friends.

A. and

B. so

C. but

D. or

答案：

A. and

B. so

(答案→)C. but

D. or

解析：考查连词：A. and并且，B. so所以，C. but但是，D. or或者，句意：--约翰已经在这儿多久了？--两年，但是我没有朋友。两句话是转折关系，选C。