Everyone knows that ______ paper was invented by _______ Chinese.
| A．/; the | B．the; a | C．a; / | D．a; a |
If he ________ my advice, he wouldn’t have lost his job.
| A．followed | B．had followed |
| C．should follow | D．would follow |
We _________ the difficulty together, but why didn’t you tell me?
| A．should face | B．might face |
| C．could have faced | D．must have faced |
Many people can’t learn any lessons from the mistakes they’ve made ________ they get hurt somehow.
| A．whether | B．as | C．if | D．unless |
—Have you been to the United States?
—Yes, only once. I ________ there only for seven days.
| A．have stayed | B．was staying |
| C．stayed | D．had stayed |
Would you please keep silent? The weather report ________ and I want to listen.
| A．is broadcast | B．is being broadcast |
| C．has been broadcast | D．had been broadcast |