天山SC0130

[chunjuwu]

In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing many more prescriptions for higher-cost drugs.

A. a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing

B. a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing

C. a phenomenon occurring not just because of drugs that are becoming more expensive but because of doctors having also written

D. which occurred not just because drugs are becoming more expensive but doctors are also writing

E. which occurred not just because of more expensive drugs but because doctors have also written

答案是b，問一下，c 為何錯，謝謝

[8妹]

我覺得1.時態
2.because of +名詞
請高手糾正,謝謝

[Pufa]

原題的意思是：某個現象被兩個事實解釋（藥越來越貴&醫生越常開較貴的藥）。
C的意思是：某個現象發生的原因不只是因為越來越貴的藥還因為已開了許多貴藥的醫生。

B句型工整。
1. C最大的毛病在於他改變了句意。
2. 而且not just, but (also)不比not only, but also受ETS親睞，原因可能是前者不如後者來的正式，另外，also最好也不要省略。
3. because of在多數情況下會讓句子變的很囉唆，尤其是用在較長及複雜的句子時。

疑問：doctors having also written是不是也有問題？

[chunjuwu]

原題的意思是：某個現象被兩個事實解釋（藥越來越貴&醫生越常開較貴的藥）。
C的意思是：某個現象發生的原因不只是因為越來越貴的藥還因為已開了許多貴藥的醫生。

B句型工整。
1. C最大的毛病在於他改變了句意。
2. 而且not just, but (also)不比not only, but also受ETS親睞，原因可能是前者不如後者來的正式，另外，also最好也不要省略。
3. because of在多數情況下會讓句子變的很囉唆，尤其是用在較長及複雜的句子時。

疑問：doctors having also written是不是也有問題？

Thanks Pufa, I get it.