问题补充：
单选题Sensiblepeopledon’tthinkitis_______tobuythingswhicharenotneededevenatalowprice.A.worthB.worthyC.worthlessD.worthwhile
答案：
D解析It is worthwhile to do sth“值得做某事”。it is worth doing sth it is worthy to be doneIt is worthy of being done
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