学习用品类名词 — 英语选择题

Tom的铅笔盒里有一支钢笔、一块橡皮、一把尺子和一本书。下列说法正确的是哪一项？ A. There is a pen in the pencil box. B. There is a bag in the pencil box. C. There is a cap in the pencil box. D. There is a key in the pencil box.