--- How come your father can read books in German?
--- Well, he on a project with some German engineers for 3 years when he was young.
| A．worked | B．was working |
| C．had worked | D．would work |
It was reported that 115 miners in the flooded mine for eight days were pulled out alive at last.
| A．trapped | B．being trapped |
| C．were trapped | D．had trapped |
--- 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．they 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 |