His grandmother has been ________ for more than ten years. 

 –Is Miss Green in the office?  --No, she ____ to the library.

 Listen! My sister_______ the piano in her room.

Tony, be quiet, please! Your dad ______ on the phone.

Tom　was　so　careless　that　he　_____　his　right　arm　when　he　was　riding　to　school.