There a ruler and some pencils on the desk.A. isB. areC. haveD. has

问题补充：

There a ruler and some pencils on the desk.

A. is

B. are

C. have

D. has

答案：

(答案→)A. is

B. are

C. have

D. has

解析：谓语动词辨析，have has一般用于表示某人拥有什么东西，there be句型表示某处有某物。there be句型中谓语动词遵循就近原则，与距谓语动词最近的名词表示一致，a ruler为单数，故选A。