题目内容:
FedsclaimedthattheirspendingonWestNilecontrolwas__________
A.worthwhileinthelongrun B.Liabletocontinueregardlessofthegreatcost
C.boundtosettletheproblemonceandforall
D.wastefulinviewofthefewvictimsofthedisease
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答案解析: