题目

It was not until 1920       regular radio broadcast began. A.while        B.which       C.that       D.since 答案：C 解析: 众所周知，当时间状语由until/till引出时，如果谓语动词为非延续性动词，则要用否定式，表示“直到……才……”。本句的正常结构应为：Regular radio broadcast didn’t begin until 1920.如果强调本句的时间状语，则要把not和until...一起放在句首，可以构成：Not until 1920 did regular radio broadcast begin.（注意表The ________ has activities like studying Chinese culture,sightseeing,looking at how China has changed and so on．A.two week campB.two-weeks' campC.two week's campD.two-week camp