问题补充:
writer, she is excellent, teacher she is not very good.
A. As; but as
B. As; and as
C. As a ; but as a
D. As a; and as a
答案:
A. As; but as
B. As; and as
(答案→)C. As a ; but as a
D. As a; and as a
解析:作为一个作家,她是优秀的;但作为一名教师,她就不是很好的了。 writer 和teacher都是可数名词,单数要加冠词a。