【評論主題】31. Drinking water ___________essential for good health.(A)is (B)are (C)that is (D)that are

【評論內容】

動名詞當主詞，視為單數，故動詞使用單數動詞。

【評論主題】31. Drinking water ___________essential for good health.(A)is (B)are (C)that is (D)that are

【評論內容】

動名詞當主詞，視為單數，故動詞使用單數動詞。