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One _____ needed when making a cake is flour; another is sugar.

        A. container    B. ingredient    C. content     D. equivalent

 One _____ needed when making a cake is flour; another is sugar.

        A. container  B. ingredient C. content  D. equivalent

 One _____ needed when making a cake is flour; another is sugar.

        A. container  B. ingredient C. content  D. equivalent

 One _____ needed when making a cake is flour; another is sugar.

        A. container  B. ingredient C. content  D. equivalent

One _____ needed when making a cake is flour; another is sugar.

　　A. container 　　　B. ingredient 　　　C. content 　　　D. equivalent