Question

【题目】The level of __________ in the river was falling.

A. populationB. prescription

C. presentationD. pollution

Answer 1

【答案】D

【解析】

考查名词词义辨析。句意：河流的污染程度在下降。A. population人口；B. prescription处方；C. presentation呈现，展示；D. pollution 污染。根据本句的in the river可知，河流的污染程度，故选D。