[ Modal Verbs ]
If he had studied harder, he __________ the exam.
A. could have passed
B. might have pass
C. could have pass
D. might have passed

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A. To help us move
B. To help us breathe
C. To help protect us from bacteria and viruses
D. To help our hair grow
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A: How was your exam? B: Not good. It was ___ difficult.
a.absolutely
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Modals › View
The woman _________ be Hue’s mother. She is too young.
A. could
B. couldn’t
