A lot of e-mail English words might us, because we seldom use it
in our daily life.
A. be familiar with
B. be familiar to
C. look unfamiliar with
D. look unfamiliar to
网友回答
A. be familiar with
B. be familiar to
C. look unfamiliar with
(答案→)D. look unfamiliar to
解析：考查固定短语。句意：许多电子邮件英文单词可能也许对我们来说并不熟悉，因为我们在日常生活中很少使用它。故选D。