clue：[kluː] n.線索，情節
We have no clue as to where she went after she left home.
我們對她離家後去往何處毫無線索。

clue on 　v.提示
If you were listening, she probably told you more than enough about herself to give you a clue on her likes and dislikes.
如果你聽進去了，也許她暗示過你很多她喜歡的和不喜歡的東西，多過她想告訴你的。

clue in向某人提供情況； 提示
He had been puzzling all day for the answer to the last clue in the crossword.
他整整一天都在為能解答縱橫填字的最后一個迷而苦思，

clueless： ['kluləs] adj. 無線索的；愚蠢的
The clueless ones do dumb things like pay too much for acquisitions in an effort to plumpearnings per share.
愚蠢的人會做一些無知的事情，比如為了增加每股收益而在收購方面耗費過多。

歡迎關注微信公眾平臺edenenglish。