[ Essential and Nonessential Clauses ]
Which of these is needed to make the sentence make sense?
A. Essential clauses/phrases
B. Nonessential clauses/phrases
Select your answer:

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Modal Verbs of Possibility › ViewHe looks tired. He ___ have worked all night.
A. must
B. might
C. can’t
D. could not
Preposition (at,in,on) › View
I don’t want to see her —- the party tonight.
A. in
B. on
C. at
