[ Grammar ]
Fill in the blank with the correct principal part of the verb. The boys have __________ their homework.
A. done
B. did
C. does
Select your answer:
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Modal Auxiliaries and To Be Verbs › View. In “The Legend of Sleepy Hollow” there ____ a teacher by the name of Ichabod Crane.
A. Am
B. Are
C. Is
Modal Verbs › View
Which modal verb is used to express obligation: Ought to or Have to?
A. Need to
B. Have to
C. Should
D. Can