6.______ after a long walk, Harry called and said he couldn’t come.
A.Having worn out
B.Be worn out
C.To wear out
D.Worn out

7. I forgot ______ her that my coat buttons need to be sewn on.
A.reminding
B.having reminded
C.to remind
D.to have reminded

8.“Why did you leave the meeting early?”
“I found the discussion______.”
A.boring
B.bored
C.bore
D.boredom

9. He gives people the impression______ all his life abroad.
A. of having spent
B. to have been spent
C. of being spent
D. to spend

10.Greater efforts to increase agricultural production must be made if food shortage______ avoided.
A.is to be
B.can be
C.will be
D.has been

D C A A A