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 The old sick lady entered the hospital, ____ her two sons.　
　 A. to support　         B. supporting 　   C. supported by　       D. having supported

 ____ many times, he still couldn't understand.　
　 A. Having been told        B. Having told      C. He having been told         D. Telling

Many things ____ impossible in the past are very common today.
　 A. consider　 B. considering 　 C. considered　 D. be considered

 The students in the university are all taking courses____  a degree.　　
　 A. coming to　　        B. going to　　    C. leading to　　　　         D. turning to

____ different kinds of pianos, the workers farther improved their quality　
　 A. To produce　 B. Being produced 　 C. Produced 　 D. Having produced

A person ____ a foreign language must be able to use the foreign language____ all about his own.　
　 A. to learn, to forget B. learning, to forget　

C. to learn, forgetting D. learning, forgetting

The wallet ____ several days ago was found____in the dustbin outside the building.　
　 A. stolen, hidden　B. stealing, hiding　 C. stealing, hidden　 D. stolen, hiding

Lessons____easily were soon forgotten.　
　 A. to learn　　　　 B. learn　 　 C. learned　 D. learning

The ground is____with____leaves.　
　 A. covering, falling B. covered, falling C. covered, fallen D. covering, fallen

 The library's study room is full of students ____ 　for the exam.
　 A. busily prepared　    B. busy preparing　  C. busyly prepare   D. are busily preparing