问题
_______ is often the case, we have worked out the production plan.
A:Which
B:When
C:What
D:As
B:When
C:What
D:As
正确答案是：
同类题型
It has been five years since the party _____Many people wonder whether it will stay on.
pe to take the computer course.— Good idea. ____ more about it, visit this website.
The moment we had been looking forward to at last.
I’m writing to ask ______ you can do me a favor.
The computer requires _______. I think I need _______ to ask Mr. Zhang for help.