_______ do you improve your listening skills I improve it _____ listening to English songs.

a new graduate, and it seems that he hasdifficulty in dealing with ________ problems arise

While previewing his lessons, the little boy will make a question mark ________ there is a question.

Bob, why do you stay silent? Can you tell me the answer?— I’m sorry, Mr. Green. Your question is very difficult ________.[ ]

He is very aware of what topics he should and should not____________at the conference.