Question

【题目】People are wearing masks to cover their __________ and noses to prevent smog. (mouth)

Answer 1

【答案】mouths

【解析】

句意：人们带着口罩遮住嘴和鼻子以防烟雾。
考查名词的复数形式。句中主语people为复数名词，所以遮住的嘴也不止一张，应该用mouth的复数形式mouths，故填mouths。