问题
选择题
A warm thought suddenly came to me _______ I might substitute the hero to buy some flowers for his mother’s 60th birthday.
A．if
B．when
C．that
D．which
答案
答案：C
考查同位语从句。thought“想法，念头”；came to sb.“（想法）出现在某人头脑中”；that引导同位语从句，是对thought的补充说明。故选C。