[ Grammar ]
An air-conditioning system _______ a refrigerated gas like Freon to cool the air
A. Using
B. Use
C. Uses
D. Used
Select your answer:
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Other quiz:
Grammar › ViewDescribes or specifies a noun
A. Verb
B. Noun
C. Adjective
Grammar › View
I___ in this house since I was 12
A. live
B. lived
C. have lived
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