- There must be a dozen pens in this house but I can never find one when I need one.- Keep

发布时间：2020-08-15 00:20:18

- There must be a dozen pens in this house but I can never find one when I need one.
- Keep looking.     is sure to turn up.
A. One
B. It
C. That
D. This

网友回答

A. One
B. It
C. That
D. This
解析：
此处one泛指上文提到的某只“pen”。
以上问题属网友观点，不代表本站立场，仅供参考！