英语智力测试：读一读,猜一猜.
问题描述：
英语智力测试：读一读,猜一猜.
Its first letter is in "book"but not in"look".Its second is in"ink"but not in"thank".Its third is in both"ink"and"book".And its last letter is not in"ship"but in"jeep".What is it?
答
bike