Tan Dun is _______ an excellent composer _______ he can make music without boundaries.
Miss Green isn’t in the office. She_______ to the library.
I didn’t hear your call because I ______ to music at that time.
My parents often______ me some gifts on my birthday.
— Must we get to the airport before 8 o’clock? — No, you _____. The plane takes off at 12 o’clock.
Which is ____________, the telephone, the computer or the light bulb?