It is ______ to examine these questions carefully by doing more group discussions.选项:a、worthy
人气：196 ℃ 时间：2020-06-12 02:30:38
解答
不知道为什么只有一个选项,不过我认为这里应该填worthwhile,it is worthwhile to do 或it is worthwhile doing 是固定用法.be worth doing ,be worthy of doing,没有be worthy to do的用法
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