问题补充:
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; /
答案:
(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。