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31. All the afternoon he worked in his study with the door ______.

A. to lock

B. locking

C. locked

D. lock

32. The old man, ______ in the city for forty years, is on the way back to his village.

A. to work

B. working

C. to have worked

D. having worked

33. ______ the front door ______, he had to enter the room through the back door.

A. Seen; painted

B. Seeing; painted

C. Being seen; being painted

D. Seeing; being painted

34. The thief fell to the ground, his left foot ______ and blood ______ down from his mouth.

A. breaking; running

B. broken; running

C. breaking; run

D. broken; run

35. All of the flowers now ______ here have developed from those once ______ in the forest.

A. raised; grown

B. rising; growing

C. raised; growing

D. rising; grown