问题
选择题
The conference will be put off until next week, _______ we will have made all the preparations.
A．which
B．in which
C．when
D．on which
答案
答案：C
这题考查定语从句，先行词是next week，定语从句中不缺主宾表，所以用when引导定语从句，修饰next week，句意是：会议将被推迟到下周，那时我们都会准备好了。选C。