One should keep one's promise
Correct answer: D. A promise should be kept
- A. One's promise should be kept
- B. One's promise has to be kept
- C. A promise should be keeping
- D. A promise should be kept
Explanation
"A promise should be kept", is a passive voice construction that conveys the same meaning, emphasizing the thing that should be done (a promise) and the action that should be taken (kept).
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