—How unhappy your roommate looks!
—Yes, but he's not willing to tell me what it is _______ is troubling him.
| A．what | B．which | C．as | D．that |
When his dad died, he felt ________his whole world was hopeless .
| A．in case | B．as though | C．so that | D．even though |
When ______ help, one often says “Thank you.” or “It’s kind of you.”
| A．offering | B．to offer | C．to be offered | D．offered |
Lin Dan won the first prize in the Beijing Olympics, which helped him gain the ____ of the world.
| A．congratulation | B．appreciation |
| C．admiration | D．administration |
This toy is meant _______ Tom as his birthday present.
| A．to | B．for | C．by | D．With |
Great changes _______ in our hometown since 1980
| A．took place | B．have happened |
| C．has been taken place | D．have taken place |