If the examination____,you have to stay in the laboratory night and day for a week.

题目

If the examination____,you have to stay in the laboratory night and day for a week.
A is done
B will be done
C is to do
D is to be done

答案

考试是被完成,所以肯定要用被动式,再者这里的意思是说"如果你有考试要完成,就必须日夜兼程地待在实验室一个礼拜"
所以呢,这个考试是在至少一周后完成的,所以相比较之下,D是best choice