问题补充:
单选题Environmentalexpertspointoutthat______someseriousproblemssuchasglobalwarming,butitalsocouldthreatenhumanlife.A.not only does increasing pollution causeB.not only causes increasing pollutionC.not only increasing pollution causesD.not only increasing pollution does cause
答案:
A解析这题考查倒装句的用法:not only在句首时,句子用部分倒装。选A。