You can hardly imagine the once clear canal _____ so seriously polluted that no

题型：同步题难度：来源：

You can hardly imagine the once clear canal _____ so seriously polluted that no fish can live in it. [     ]
A. have become
B. having become
C. to have become
D. to become

答案

举一反三

_______to reach them on the phone, we sent an e-mail instead. [     ]
A. Fail
B. Failed
C. To fail
D. Having failed

题型：安徽省月考题难度：| 查看答案

_________a reply from his son in Japan, he decided to write again.[     ]
A. Not to receive
B. Receiving not
C. Not having received
D. Having not received

题型：广西壮族自治区月考题难度：| 查看答案

____ my homework, I have no time for computer games. [ ]
A. Not finishing
B. To be finishing
C. Having not finished
D. Not having finished

题型：山东省期末题难度：| 查看答案

_____ with his wife twice, James decided it was time that they had a heart-to-heart talk.[     ]
A. Quarreling
B. Quarreled
C. Having quarreled
D. To quarrel

题型：四川省月考题难度：| 查看答案

___ the danger of drunk driving, many drivers promised never to drive after drinking.  [     ]
A. To realize
B. To have realized
C. Realized
D. Having realized

题型：河南省期中题难度：| 查看答案