题目内容
Ⅲ. 单项填空
1.( 2015江苏宿迁钟吾中学模拟) It’s best to stay iidoors , when PM2. 5 has reached dangerous levels.
A. exactly B. possibly
C. especially D. generally
l.C句意:最好待在室内,特别是当PM2. 5达到危险程度时exactly正确地,精确地;possibly可能地;especially特别,尤其;generally通常。根据句意可知应选C.
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