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专升本
It is essential that all these figures______twice.
It is essential that all these figures______twice.
admin
2019-10-23
19
问题
It is essential that all these figures______twice.
选项
A、must be checked
B、be checked
C、is checked
D、will be checked
答案
B
解析
这是一种虚拟语气。类似的还有“it is important，it is necessary”等。从句用should do的形式，should可以省略。
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