There a book and three pens on my desk just now but now there is nothing on it. A. had B.

问题补充：

There a book and three pens on my desk just now，but now there is nothing on it.

A. had B. were C. was

答案：

解析：考查there be句型用法。此处表示“有一本书和三支钢笔在桌子上。”，要用there be句型，根据there be句型就近的原则，后面是a book，故用单数，又因为有just now，故要用过去时态。