[ Modals ]
Which of the following sentences shows an obligation using a modal verb?
A. You must submit your report by Friday.
B. You should submit your report by Monday.
C. You can submit your report at any time.
D. You might submit your report by Friday.

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Question Tags › ViewYou aren’t listening to me, ….?
A. don’t you?
B. do you?
C. are you?
D. isn’t it?
Grammar and Vocabulary › View
What best describes the underlined portion “have valued” in the sentence: Throughout history, people have valued gold?
A. Present perfect tense
B. Simple present tense
C. Simple past tense
D. Past perfect tense
Who or Whom › ViewIf the train kept going, it would run into a person (who/whom) he did not know.
A. who
B. whom
Grammar › View
In school students ____ eat in the cafeteria.
A. don’t have to
B. doesn’t have to
C. mustn’t
