After visiting Harbin, most of the foreign friends said they would never forget the time they had spent.
A. that
B. what
C. when
D. at which
网友回答
(答案→)A. that
B. what
C. when
D. at which
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。