There a pen and some pencils on the desk.A. areB. is　C. haveD. has

问题补充：

There a pen and some pencils on the desk.

A. are

B. is

C. have

D. has

答案：

A. are

(答案→)B. is

C. have

D. has

解析：根据there可知，这应该是there be句型，所以应该排除CD；根据a pen是单数名词，故用is。所以本题选B。