题目

People say, Guilin's scenery is matchless in the world. It was not until I visited the place _____ I found it really worthy of the reputation.A.where B.when C.that D.then 答案：【答案】C【解析】考查强调句。句意：人们常说:“桂林山水甲天下。”直到我参观了那个地方，我才发现它确实名副其实。分析句子结构，除开it was和连接词部分剩下的句子结构完整，可知本句为强调句结构“it is (was)+被强调成分+that (who)+其他”，此处强调的是“not until I visited the place”。故选C。（2009?泸州）向盐酸溶液中滴加硝酸银溶液有白色沉淀产生，白色沉淀的名称是______，反应的化学方程式为______．