[ Simple Past or Past Continuous ]
He didn’t . . . . . the answer for that question.
A. knew
B. know
C. known
D. knows
Select your answer:
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Grammar › ViewKendrick and Drake perform on the same night. Have you decided which concert you will go ________?
A. to
B. too
C. two
Modal Verbs › View
This is not possible. You ______________ be serious!
A. might not
B. mustn’t
C. can’t