Question

【题目】We should often open windows to make air _______ to decrease disease transmission.

A. focus B. respond

C. affect D. circulate

Answer 1

【答案】D

【解析】

考查动词辨析。句意：我们应该经常打开窗户，让空气流通，以减少疾病传播。A. focus集中；B. respond回答；C. affect影响；D. circulate使流通，根据题意，故选D。