18.（ ）

(单选题)The first paragraph is mainly concerned with ______. (单选题)Why did Wild Bill Hickok shoot holes in a hat? (单选题)From this passage, we know that Wild Bill Hickok was not ___ (单选题)The feature that most distinguished Wild Bill Hickok was his (单选题)（ ） (单选题)Water, food and air are ______ great importance ______ human (单选题)To be ______, they need to consider the future and deal with (单选题)______ to arrange your time properly, and you can do more th (单选题)She insisted ______ she was innocent, but it seemed nobody _ (单选题)Her father looks ______ than he is.