—Why didn’t you finish the task? —I didn’t think it is the effort.A. worthwhileB. deservi

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A. worthwhile
B. deserving
C. valuable
(答案→)D. worth
解析：句意：— 你为什么没完成任务？— 我觉得它不值得努力。deserving (of)值得…的；valuable有价值的；worth是一个只能作表语的形容词，意思为“值……的”、“相当于……的价值的”、“有……价值的”、“值得……的”。后面接名词、或主动形式的动名词作宾语。例如：This second-hand car is worth $2000 at the most. The exhibition is worth a visit/visiting. It’s not worth getting angry with him.；worthwhile既可作表语，又可作定语。表示某事因重要、有趣或受益大而值得花时间、金钱或努力去做，一般做“值得的”、“值得做的”、“有意义的”解。用作表语时，可接动名词或动词不定式。例如： The Summer Palace is worthwhile going / to go to have a visit. Helping old people is a worthwhile activity. Thank you for your worthwhile suggestion.由此可以看出选D正确。
考点: 考查形容词词义辨析的用法。