问题详情：
The town’s drinking-water _____ with prim chemicals at present.
A. contaminates B. is contaminated C. is being contaminated D. has been contaminated
【回答】
C
解析：“这城市的饮用水目前正受到有毒化学*品的污染。”drinking-water与contaminate之间存在被动关系，由at present可知应用进行时的被动式，
知识点：现在进行时及其被动式
题型：选择题
