My brother’s never been late for school up till now, ________?

Tom’s never been late for school before, _______ ?

—You will go swimming this Saturday, won’t you?—      . I have to work this Saturday.

E- mail is very popular today. People seldom write letters now, _________?

-The captain（船长）of the Sewol ferry（岁月号）hardly do anything to help the passengers on the ferry。          ？-              ，so over two hundred people lost their lives in the accident。