As we all know,deer --- timid.A be B is C are D being

题目

As we all know,deer --- timid.A be B is C are D being

答案

deer是一个比较特殊的词,单复数同形,这里在deer前面没有a,那就不使用一个代全体的用法如a man之类,而只能是用作复数,这个典地方说鹿很胆小,是一个客观事实陈述,所以用一般现在时复数形式are.
选C.