_______such heavy pollution already, it may now be too late to clean up the rive

题型：同步题难度：来源：

_______such heavy pollution already, it may now be too late to clean up the river.[     ]
A. Having suffered
B. Suffering
C. To suffer
D. Suffered

答案

举一反三

____ enough money, Jim was unable to buy his girl-friend expensive jewellery. [ ]
A. Not to save
B. Not saving
C. Not saved
D. Not having saved

题型：专项题难度：| 查看答案

— Would you go to the concert this evening?
— Sorry. ________ tomorrow"s lessons, I have no time to go out with you.[     ]
A. Not preparing
B. Not having prepared
C. Not to prepare
D. Being not prepared

题型：同步题难度：| 查看答案

_______ the apartment, the firefighters shut off the gas, opened the windows and rescued the
old  couple.  [      ]
A. To break into
B. To be broken into
C. Having broken into
D. Broken into

题型：专项题难度：| 查看答案

The young man, ________ several attempts to beat the world record in high jumping, decided to
have another try.  [     ]
A. to make
B. making
C. made
D. having made

题型：专项题难度：| 查看答案

-Would you go to the concert this evening?
-Sorry. ________ tomorrow"s lessons, I have no time to go out with you.[     ]
A．Not preparing
B．Not having prepared
C．Not to prepare
D．Being not prepared

题型：同步题难度：| 查看答案