—What’s this in English?—It’s.A. P-E-NB. His penC. a penD. an pen

问题补充：

—What’s this in English?

—It’s.

A. P-E-N

B. His pen

C. a pen

D. an pen

答案：

A. P-E-N

B. His pen

(答案→)C. a pen

D. an pen

解析：句意：——这个用英语怎么说？——它是pen。pen是以辅音音素[p]开头，其前用不定冠词a。故选C。