【单选题】To tell the truth, what you said was too ________ for us to understand.
【单选题】—Can you tell us what is important to a businessman? — ________ information.
【简答题】Thank you for your letter of April 15, ______(tell)us what really happened in the US on April 10.
【单选题】5 个人站成一排照相,若甲必须站在中间,则共有( )种不同的选法.