They ___ have left without telling us; that's rude. MCQ with Answer and Explanation

They ___ have left without telling us; that's rude.
A. mustn't
B. shouldn't
C. wouldn't
D. couldn't
Answer: Option B
Solution (By JKSSB Mock Tests)
'Shouldn't have' criticises past action.

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Practice More Modals Questions

Question #1
You ___ have told me sooner; I could have helped.
A. would
B. must
C. should
D. could

Correct Answer: Option C


Explanation:
'Should have' indicates advisable past action.

This question belongs to: English Modals
Question #2
___ we eat out tonight?
A. Shall
B. May
C. Will
D. Must

Correct Answer: Option A


Explanation:
'Shall' suggestion.

This question belongs to: English Modals
Question #3
I ___ not have gone out without an umbrella; now I'm soaked.
A. should
B. must
C. would
D. could

Correct Answer: Option A


Explanation:
'Should not have' regret.

This question belongs to: English Modals