you must improve your work, or I shall dismiss you. [ ] A．IfB．Unless C．EitherD．W
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_______ you must improve your work, or I shall dismiss you.
[]
A．IfB．UnlessC．EitherD．When
试题答案
答案：
解析：固定搭配either…or |
_______ you must improve your work, or I shall dismiss you.
[]
A．IfB．UnlessC．EitherD．When
答案：
解析：固定搭配either…or |