When the door bell ________I was listening to music.
The MP3 _____ too much .He ____ 200 yuan _____ it .
—I am trying my best to learn English, but it doesn’t work well!—Don’t worry! Regard it _____ a big challenge!
I had a little trouble English grammar.
—How do you improve your listening skill, Mary?—I often do it _________ tapes and English radios.
I’m new at the party and I don’t have a friend ____.