– People all over the world do something good for the earth on April 22nd –– Earth Day. – Well. ______ what we should do is to make every day Earth Day.A. And B. So C. But
If we ______ take environmental problems seriously, the earth _______ worse and worse.
— How far is it from Tianjin to Changsha?— It is a _______ flight from Tianjin to Changsha.
She got a nice skirt as a present on her birthday. Do you know _______ ?
— I’m sorry, sir. I’ve made a lot of mistakes in the exam.— Never mind. _______, the exam is a little difficult.
— Why don’t you watch TV at home?— I’d love to, but my mother doesn’t allow me _______ that.