-----Is that your book ? ------No, ________ .
| A．they are | B．they aren’t | C．it is | D．it isn’t. |
Mr Black is at home, but he doesn’t feel .
| A．alone, alone | B．alone, lonely |
| C．lonely, alone | D．lonely, lonely |
This room is much _________ than that one.
| A．big | B．bigger |
| C．biggest | D．the biggest |
— 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 |