Citing the recent increase in earnings by several computer companies, economists feel that
a cycle has begun in which personal computer users, especially corporate consumers, are replacing their PC’s with more powerful models.
A. a cycle has begun in which personal computer users
B. a cycle for personal computer users has begun in which they
C. there is a cycle beginning for personal computer users
D. it is the beginning of a cycle for personal computer users
E. personal computer users are in the beginning of a cycle when they 答案是a,可以讲讲其中的语法考点马?谢谢了!~ |