It can not be denied that the existing resources on earth will be depleted, but scientists are ______to concede the inevitabilit

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问题 It can not be denied that the existing resources on earth will be depleted, but scientists are ______to concede the inevitability of that day, realizing that new energies can be found in the near future.

选项 A、bound
B、unprepared
C、hesitant
D、likely

答案C

解析 A项意为“非做不可的、有义务的”;B项意为“尚未准备好的”;C项意为“有疑虑的、不愿的”;D项意为“有可能的”。因此,C选项符合题意。
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