I often see her _______ the piano. Listen, can you hear her _________ the piano now?
Look! The bird __in the sky.A. is flying B. flies C. fly
My birds can ___by one of my friends while I'm away.A. be looking afterB. look afterC. be looked after.
Jack__China__two years.A.has been in, forB. has been in, sinceC. has come to, for
John knows a computer.A. how to use B. how use C. how uses
I don't know when he . When he , I'll let you know.A. comes, comes B. will come, comes C. comes , will come