You look tired. __________ working indoors, you should go outfor a walk.
______ care of the baby, or it may fall ill.
The old man lives at home but he never feels _________.
My classmate Lily is in English because she once stayed in the U.S. for several years.
Gerneally speaking, it is difficult to breathe at a high of Tibet (西藏).
When I was tired of my work, I would my belongings and go on a short trip.