Question

【題目】World No Tobacco Day on May 31st, and scientists have had the term “third-hand” smoke introduced to the public．

A. falls B. fell

C. has fallen D. is falling

Answer 1

【答案】A

【解析】考查時(shí)態(tài)。句意：世界無(wú)煙日定于五月三十一日。根據(jù)句意可知用一般現(xiàn)在時(shí)態(tài)，World No Tobacco Day是句子的主語(yǔ)，單數(shù)第三人稱，故答案為A。