---Are Mr. and Mrs. Black at home? --- No. ________ of them are at work.
To help the sick people in the hospital is _____ for me .
-He didn’t go to the concert yesterday, did he?-______.He was busy studying for the tests all day.
My hometown ______ a lot in the past ten years.
—I hear Huang Gang made an English speak at the graduation ceremony yesterday.--_______, and _______.
This type of MP4 is my favorite, but I can’t ______ it.