【2014年湖北省恩施州中考】-Look! A man is standing on his two hands.-Yes. It seems he_____ for long.A. practicedB. has practicedC. was practicing
-Do the interesting books belong to________? - No, they are the __________ .
We had fun________ in the swimming pool last Sunday.
There must be a boy ________ basketball outside the door. I hear him crying.
Have you done ____ to improve the environment ?
—Who helped Betty tidy up the bedroom just now? —________. She cleaned it all by herself.