—What happened to the postman?
—I don't know. He______ around here for a long time.
| A．hasn'tseen | B．didn'tsee | C．wasn'tseen | D．hasn'tbeenseen |
Have the villagers already known ________ we’ll do is to rebuild the bridge?
| A．this | B．that | C．what | D．which |
—Did you forget about my birthday?
—________. I should have booked a table at Michel’s restaurant for you.
| A．What then? | B．How could I? |
| C．For sure. | D．I’m awfully sorry. |
It is known to all that ________ People’s Republic of China is ________ biggest developing country in the world.
| A．the; / | B．/; the | C．the; the | D．/; / |
No one has _____ been able to trace the author of the poem.
| A．still | B．yet | C．already | D．just |
The ship was _____ in a storm off Jamaica.
| A．drowned | B．sunk | C．wrecked | D．submitted |