Colours can make us or sad.
My husband always ______ me flowers every week before we got married, but now he never ________.
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.