大家帮忙一道题目，小妹跪谢了

1.                             As the etched lines on computer memory chips have become thinner and the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have vastly increased.

(A) the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have

(B) the chips’ circuits more complex, the power of both the chips and the electronic devices they drive has

(C) the chips’ circuits are more complex, both the power of the chips and the electronic devices they drive has

(D) their circuits are more complex, the power of both the chips and the electronic devices they drive have（B）

(E) their circuits more complex, both the power of the chips and the electronic devices they drive have


为什么用了has 他对应的是什么.


这个月23号我就要考试了，所以这几天经常麻烦大家的


    

the chips' circuits more complex其实是在more complex前面承前省略了have become，因为前面已经有have become了，所以后面可以省略它，以表简洁。在GMAT语法中常有这样的例子---承前省略。