While we ________ an English song, some visitors came into our classroom.
| A． |
were singing |
B． |
sang |
C． |
are singing |
I didn’t hear your call because I__________to music at that time.
| A．listen | B．will listen |
| C．am listening | D．was listening |
I won’t make such a silly mistake again. I’ll be__________ next time.
| A．careful | B．carefully |
| C．more careful | D．more carefully |
—Which of these shirts do you like best?
— I’ll take ___________ . They are all expensive and out of fashion.
| A．neither | B．either | C．none | D．both |
-- Someone is knocking at the door. Is it Amy?
--It ________ be her. She is giving a performance at the theater now.
| A．may | B．must | C．can’t | D．mustn’t |
---What is happening over there?
--- Oh, about ________ fans are waiting here. They want to see the great singer.
| A．two thousand of | B．two thousand |
| C．thousand of | D．two thousands of |