[ IN, ON & AT ]
She stood _____ the window and looked out.
A. IN
B. ON
C. AT
D. [ – ]

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Vocabulary and Grammar › ViewLast week I _____ part in the swimming competition.
A. take
B. took
C. taken
D. taking
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Dia _______ us some magic.
A. showed
B. is show
C. has showed
Grammar › ViewWaste from industrial and agricultural ____ pollutes the water that is used by humans, animals and plants.
A. acts
B. actions
C. interactions
D. activities
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Children are doing … homework.
A. their
B. his
C. her