Last night, Dan hung out with his friends too late. When he came home, he went upstairs without a _______. But to his surprise, his father was sitting in his room.
---It’s a long time we last met. How is everything going?---Well, I am living a happy life.
--- _________ has he taught in the school?---Since he left the college.
--- Must I return the book this week?--- No, you ____________. You can ____________ it for 20 days.
Look! __________ high speed the car is __________! It’s so dangerous.
Father put the ladder(梯子)_________ the tree to pick the apples for me.