[ Prepositions ]
When he joined the army, he acted _______ compulsion.
A. On
B. After
C. Upon
D. In

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Grammar › ViewHow much food?
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. Which detail does the author include to support the idea that the space station is useful?
A. It makes people rich.
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A. should´nt
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____ time to leave for the birthday party.
A. its
B. it’s
