It is reported that there is no better ______ for mother’s milk.

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问题 It is reported that there is no better ______ for mother’s milk.

选项 A、alternative
B、equivalence
C、exchange
D、substitute

答案D

解析 难词辨析。原句为,据报道没有比母乳更好的代用品了。故选substitute,代用品。
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