[ Modals ]
People ___ throw garbage into the river.
A. must
B. mustn’t
C. may
D. are

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Modal Verbs › ViewMAY and CAN express __________________________.
A. an action that happened yesterday
B. that something is possible or problable
C. an emotion and feelings
Adjective or Adverb › View
The story of Tum Teav sounds very ________.
A. sad
B. sadly
Articles › View__ flights attendants have to speak several languages.
A. a
B. an
C. the
D. no article
Vocabulary › View
The sentence that states the central idea of a writing assignment and helps control the ideas within the essay.
A. reason
B. bold
C. thesis statement
D. opinion
