问题补充：
The managers consider it is important that everything by weekend.
A. will complete
B. has completed
C. be completed
D. is completing
答案：
A. will complete
B. has completed
(答案→)C. be completed
D. is completing
解析：C考查语态和虚拟语气。句意：经理们认为在周末以前把所有的事情完成很重要。该题干中that之后要用虚拟语气 should do的结构，其中的should可以省略；另外everything是“被完成”，此处要用被动结构，因此要用(should) be completed。故答案为C项。
