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WHEN FOOD AND GERMS COLLECT IN A SMALL CRACK, OUR...
WHEN FOOD AND GERMS COLLECT IN A SMALL CRACK, OUR TEETH ...A. BECOM...
Lớp 9
DE KIEM TRA HSG LOP 9 MON TIENG ANH
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2. When food and germs collect in a small crack, our teeth ...A. become hard B. begin to decay.C. send poison into the blood. D. makes us feel quite ill.
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DE KIEM TRA HSG LOP 9 MON TIENG ANH