The moment Leo will never forget is Mr. Smith gave him a lot of valuable advice on how to improve his writing.
A. that; when
B. that; that
C. when; that
D. when; /
网友回答
(答案→)A. that; when
B. that; that
C. when; that
D. when; /
解析：考查从句辨析。第一格是定语从句，先行词在定语从句中做宾语，故用关系代词that；第二格是表语从句，由于主语是the moment，所以应用when引导表语从句。