Hearing the dog barking fiercely, away.
| A． | fleeing the thief | B． | was fleeing the thief |
| C． | the thief was fleeing | D． | fled the thief |
--- It’s been a wonderful birthday Party．Thank you very much．
--- ___________．
| A．No, thanks | B．I’m glad to hear that |
| C．My pleasure | D．It’s OK |
________ in Tibet for ten years, he has been accustomed to the life and the climate there.
| A．He has worked | B．Having worked |
| C．He has been working | D．Working |
30. Look! What a mess the room is! In my opinion, it needs ______.
| A．cleaning up | B．being cleaned up | C．to clean up | D．clean up |
--- Don’t waste any paper, because our forests ____ every day.
----Sorry, I didn’t know that.
| A．decreased | B．had decreased | C．have decreased | D．are decreasing |
. The child, who 
has a gift for sports, might make a first-class tennis player if given chances to develop her ______.
| A．courage | B．habit | C．potential | D．sense |