With more forests destroyed, huge quantities of good earth _____ for the past few decades.
[     ]
A. is washing away
B. has been washed away
C. are washed away
D. have been washed away
My friend, Tom, left New York in 1976 and _____ since then.
[     ]
A. hadn't been heard of
B. hasn't been heard of
C. hasn't heard of
D. hadn't heard of

Millions of pounds' worth of damage ____ by a storm which swept across the north of England last night.

[     ]
A. has been caused
B. had been caused
C. will be caused
D. will have been caused
The construction of the two new railway lines _____ by now.
[     ]
A. has completed
B. have completed
C. have been completed
D. has been completed
All _____ done now.
[     ]
A. have
B. has
C. has been
D. have been
Every possible means ______ but no one knows which is suitable.
[     ]
A. has discussed
B. have been discussed
C. has been discussed
D. were discussed
Customers are asked to make sure that they ____ the right change before leaving the shop. 　　
[     ]
A. will give
B. have been given 　　
C. have given
D. will be given
I got caught in the rain and my suit _____.
[     ]
A. has ruined
B. had ruined
C. has been ruined
D. had been ruined
When you get the paper back, pay special attention to what  ______.
[     ]
A. have marked
B. have been marked
C. had marked
D. had been marked
If Newton lived today, he would be surprised by what ____ in science and technology.
[     ]

A. had discovered
B. had been discovered
C. has discovered
D. has been discovered

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