Since no other way to escape from the flood, ____ only safe thing is to take ___

题型：不详难度：来源：

Since no other way to escape from the flood, ____ only safe thing is to take ____chance.

A．an ; 不填

B．the ; a

C．an; a

D．不填；the

答案

B

解析

考查冠词。句意：既然没有其它办法逃离这场洪水，唯一安全的事情就是抓住一次机会。前文根据only可知特指某次机会，故用定冠词。下文结合语境可知是泛指每一次机会，故用不定冠词。选B。