问题
id everything in their power to save the building dating back to the Qing Dynasty, but their efforts were _______.
A:in turn
B:in time
C:in vain
D:in need;
B:in time
C:in vain
D:in need;
正确答案是：
同类题型
A number of students _______ in the dining hall.——Yes. The number of the students________ 800.
____ we want to know is whether we must finish thework ____ you assigned last week
She looks forward every spring to _____theflower-lined garden．