SAT每日一题12.14

Choose the word or set of words that, wheninserted in the sentence, best fits the meaningof the sentence as a whole.Bromelain, an enzyme found in pineapples, is not ------- in preventing bone and joint diseases, whichcan make bones susceptible to injury, but it can help injured bones -------.

(A) corrective . . heal

(B) effective . . recover

(C) detrimental . . multiply

(D) supportive . . degenerate

(E) vital . . persist

答案：B

解析：

It makes sense to say that although bromelain is not"effective" against, or cannot prevent, bone injury,it is effective in helping injured bones "recover."