问题
选择题
Some people have the idea_____ you can cross Canada in less than five days.
A．what
B．that
C．which
D．when
答案
答案：B
考查同位语从句。同位语从句That you can cross Canada in less than five days解释名词the idea的内容。That只起引导作用，不在句中做任何成分。