Question

我不知道汤姆是否回来参加会议.（whether...or not）顺便问一下,你知道去邮局的路吗?（by the way

Answer 1

1I do not know whether Tom can go back to join in the meeting or not .

2By the way ,do you know the way to post office .

3to work 改成work .make something do 表示something 被做,

4listening