—What’s this?
—It’s a machine which was invented in __________century in China.
| A．six | B．sixth | C．the six | D．the sixth |
—Look, an old man is in the middle of the road. It’s too dangerous.
—Let’s go and help him go __________the road.
| A．over | B．on | C．across | D．through |
—Can you go to the movie with me this afternoon?
—Sorry. I’ve __________appointment with my dentist. I’m going to see him.
| A．an | B．/ | C．the | D．a |
If you want to make yourself _____, you should speak clearly and slowly.
| A．understand | B．understood | C．to understand | D．understanding |
We expected Carl ______ his dream.
| A．realize | B．to realize | C．realizing | D．realized |