gwd5-39

tuxedo

Q39:

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

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

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

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

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

why is B not C?

B means doctors 正在writing prescription, 时态不对啊．

joe11

B. 全都是现在时，很工整的。drugs are becoming ...doctors are writing

C. occurring not just because of drugs but because of doctors

把定语从句剔除后再看，是不是逻辑意义不对呀？

kaiwang99

I think "because of" can't be follow by the subject + ing form. In addition, "having written" sounds awarkward.

xiaozhuzhu

Does "not just...but also" equal to "not only... but also"?

Thanks!