[ Past form of Modals ]
If you want to be healthy, you __________ eat vegetables and fruit.
A. can
B. could
C. should
D. must

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Grammar › ViewWhat are WH QUESTIONS WORDS?
A. how, am, where, do, where
B. where, why, when, do, does
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Conjunctions › View
The hospital was crowded _______ the virus.
A. Because
B. since
C. because of
D. so