問題詳情
6.Dentists tell us that we need only simple dental _ , i.e. regular, correct use of a soft toothbrush and of dental floss, to keep our breath fresh.
(A) requirement
(B) treatment
(C) hygiene
(D) compulsion
(A) requirement
(B) treatment
(C) hygiene
(D) compulsion
參考答案
無參考答案
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