[ Conditionals ]
Your teeth ………. (be) cleaner if you ………. (use) toothpaste.
A. are/ use
B. are/uses
C. is/use
D. ares/uses
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Vocabulary › ViewDo you live …………… here?
A. near
B. at
C. on
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water and human waste washed down sinks, showers, and toilets
A. emissions
B. smog
C. acid rain
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Grammar › View
I ______ (phone) home ______ Christmas.
A. I have phoned home for Christmas.
B. I have phoned home since Christmas.
C. I has phoned home since Christmas.
D. I has phoned home for Christmas.