[ Comparatives, Superlatives, and Modals ]
Choose the correct sentence using ‘must’ for obligation:
A. You must to wear a uniform.
B. You must wearing a uniform.
C. You must wear a uniform.

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Grammar and Vocabulary › View_________ farming is better for the environment because it doesn’t use harmful chemicals.
A. chemistry
B. products
C. environment
D. organic
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What does the word ‘decrees’ mean?
A. an infectious disease that causes a high rate of death
B. mischievous
C. energetic
D. to declare a formal order
Vocabulary › ViewTo draw a conclusion from fact; to infer
A. motive
B. sleuth
C. complexity
D. deduce
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My mother ________ in the supermarket all afternoon.
A. has been working
B. has worked
C. is working
D. works
