Question

【题目】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】考查时态。句意：世界无烟日定于五月三十一日。根据句意可知用一般现在时态，World No Tobacco Day是句子的主语，单数第三人称，故答案为A。