【题目】After visiting China, most of the foreign friends said they would never forget the time they had spent in China.
A. that B. what
C. when D. at which
在线课程【答案】A
【解析】答案：A 考查定语从句。句意为：在访问过哈尔滨之后，大多数外国友人都说，他们永远不会忘记在那里度过的那段时光。句式分析可知，先行词为the time，从句中缺少宾语成分(作spend的宾语)，故应用which或that来引导定语从句。故答案选A。