--Hi, Tracy, you look tired.
--I am tired. I__________ the living-room all day.
| A．painted | B．have been painting |
| C．had painted | D．have painted |
–________ he made up his mind to take a trip to Europe?
–Last week when he got an unexpected reward.
| A．When was it that | B．That was it when |
| C．That it was when | D．When it was that |
–Can you come on Monday? –No, I am_______.
| A．stuck | B．engaged | C．lost | D．puzzled |
Anything _____ could be found has been used to repair the damaged bridge.
| A．which | B．that | C．what | D．不填 |
Here is my classmate _____ bicycle was lost yesterday.
| A．his | B．that | C．whose | D．which |
_____ seemed as if nobody knew anything about the matter.
| A．This | B．That | C．It | D．One |