（1）Do you want to work as a postman?
(2)what is mary's work?
(3)They'd like to give their food to eah other sometime.
(4)This sign means"Taking photos here is not allow"
(5)we are not allowed to pick the flowers.
(6)抱歉这句我不太懂,好像有歧义
(7)Don't make noise here
(8)Our class has 40 students
(9)My mother is good at cooking.
用英文解释如上