In order to do something meaningful, it’s necessary that you determine what is really important.
A. must
B. will
C. need
D. should
网友回答
A. must
B. will
C. need
(答案→)D. should
解析：句意：为了做一些有意义的事情，你决定什么是真正重要的很必要。这里使用了句型：it’s necessary that+从句，从句中用should do表示虚拟语气，should可以省略，所以选D。