英语翻译（1）认真思考（2）可以打扰一下吗?（3）请问有人在家吗（4）敢于发表自己的观点（5）在约定的时间到达约定的地点（6）希望这会是一个惊喜

think carefully或者说think twice
excuse me
anybody in?
brave enough to propose one's idea
arrive in the appointed place at the appointed time
hope that it'll be a surprise