--- He looks so tired. What’s wrong?
--- Nothing serious. He just stayed up last night, ___________his papers.
| A．to prepare | B．having prepared | C．prepared | D．preparing |
—Have you heard that Jones, along with her parents, to Hainan for the winter vacation?
— Really? No wonder I haven’t seen her these days.
| A．had been | B．have been | C．has gone | D．have gone |
Not until they left school how much their teachers loved them and helped them.
| A．they realized | B．did they realized |
| C．the would realized | D．had they realized |
It’s nice to see you again. What since we last met?
| A．have you done | B．had you done |
| C．have you been doing | D．did you do |
— Shall we take the 10:20 train?
—No. If we took that train, we too late.
| A．arrive | B．arrived | C．will arrive | D．would arrive |
— I had thought he would be nervous in this speech competition, but he turned out to be calm.
— He quite enough preparation for it.
| A．should do | B．must do | C．should have done | D．must have done |