单项选择题
Dump sewage into oceans and rivers is a serious form of pollution.（）
A. Having dumped sewage B. Being dumped sewage C. Dumped sewage D. Dumping sewage
单项选择题 He has a touch of eccentricity in his composition.（）
单项选择题 The most striking technological success in the 20th century is probably the computer revolution.（）
单项选择题 All living creatures pass on inherited traits from one generation to other.（）
