Question

It wasn’t until 1970        the war finally came to an end after seven years of hard fighting.

A．that

B．before

C．when

D．since

Answer 1

A               

             
试题分析：考查强调句。句意：直到1970年，经过七年战火，战争才最终结束 。come to an end 终结。Not until引导的倒装 句与强调句连用，原句为 not until 1970 did the war finally come to an end after  seven years of hard fighting.故选A项。          
考点 : 考查强调句