The animals, highly sensitive to pollution, can______monitors of water quality.

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问题 The animals, highly sensitive to pollution, can______monitors of water quality.

选项 A、serve as
B、work for
C、make up
D、take on

答案A

解析 本题考查动词词组辨析。serve as意为“伺候,担当”;work for意为“为…工作”;make up意为“编造”;take on意为“呈现,承担”。根据句意,故选A。
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