【题目】Every means __________ prevent the water from __________.
A. are used to; polluting
B. get used to; polluting
C. is used to; polluted
D. is used to; being polluted
在线课程【答案】D
【解析】句意：为阻止水污染，各种各样的办法都用了。means单复数同形，主语为every means，谓语用单数；prevent sb. /sth. from doing sth. 防止某人做某事；water与prevent之间为动宾关系。