Whenever and wherever we are, keep in mind that we should listen more to others. It’s wrong to express ourselves without thinking. Just as we all know, ___________.

Do you mind me opening the window —______ .It’s so cold outside.

l remember that terrible accident a few days ago, ____ more than 20 pupils were killed.

Our government is doing _______ to protect the environment. -That’s great.

Our city has experienced ___this year as it did last year.