---What are these ?- are pens.A. They’reB. ThoseC. TheyD. It

问题补充：

---What are these ? --- are pens.

A. They’re

B. Those

C. They

D. It

答案：

A. They’re

B. Those

(答案→)C. They

D. It

解析：句意：这些是什么？他们是钢笔。A他们是B那些C他们D它。根据句意可知，应选他们they。