1、Why is an empty matchbox the best thing to have in the world?
为什么空火柴盒是最好的东西吗?
2、Why did the banker keep looking up at the sky?
银行家为什么老是抬头看天?
3、When do dogs refuse to follow their owners?
狗什么时候不愿跟随主人?
答案：
1、Because it's matchless
matchless:没有火柴，无敌
2、To see if there's any change in the sky
change:变化，零钱
3、When their owners go to the flea market.
flea market:跳蚤市场