–Look at that girl! Is it Susan?
--No, it _______ be her. She went to her hometown just now.
| A．mustn’t | B．can’t | C．needn’t | D．wouldn’t |
— have you danced?
—Since I was six.
| A．How often | B．When |
| C．How long | D．What time |
While I ________to the programs, my mother ________outside.
| A．listened; was washing |
| B．was listening; washed |
| C．was listening; was washing |
| D．was listening; is washing |
It ______ the workers about 20 months to build the Huhang highspeed railway.
| A．took | B．spent |
| C．cost | D．paid |
He was _______ pain, __________ he didn’t cry.
| A．in, but | B．with, and |
| C．at, or | D．in, and |
My sister got a beautiful present on her ________ birthday.
| A．fiveth | B．five |
| C．the fifth | D．fifth |