______has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
—She is angry with me, isn’t she? ---______.
---May I have a copy of Lu Xun’s short stories? ---Certainly. ___.
To ___ with, he is too lazy.
He ___ me he was going abroad for further study, but he didn't ___ when he was leaving.
Having entered the classroom, the teacher ___ the book on the desk.