问题
选择题
Why did you take a taxi____you could come here by bus?
A．while
B．unless
C．when
D．until
答案
答案：C
本题考查连词when的一词多义。此处When相当于since .How can I help them to understand when they won’t listen to me?其余的选项没有这个用法。
【标签】连词一词多义