[ Vocabulary ]
the careful use of a resource to prevent it from being wasted and make it last longer
A. efficiency
B. nutrient depletion
C. ozone
D. conservation
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Wish Clause › ViewGloria never seems to get tired. I wish I —- her energy
A. would have
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Crocodile is …… reptile. It is one of the …… animals on Earth.
A. an , older
B. an , oldest
C. a , older
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