be keen
问题描述：
be keen
答
艾达用惊奇而敏锐的眼光望了一下面前的那群人.From the curbstone he darted a keen glance through the door of the postoffice.他从人行道的边石那儿朝邮政局门口投了锐利的一瞥.When spake heard the BBC were ke...