We should tell hunters _______tigers.
| A．don’t kill | B．not kill | C．killing | D．not to kill |
The Xiamen-Shenzhen high speed railroad will run________eight cities．
A．across
B．through
C．over
When the door bell ________I was listening to music．
| A．went off |
| B．went out |
| C．broke down |
| D．set off |
Yesterday I met Sandy．We________each other since________middle school．
| A．haven’t seen；finished |
| B．haven’t seen；finishing |
| C．hadn’t seen；finished |
| D．hadn’t seen；finishing |
—What did Bob ask you just now?
—He wanted to know how long________when he reached the cinema．
A．the film had started
B．the film will start
C．the film had been on
Helen________her keys in the office so she had to wait until her husband________home．
| A．has left；comes |
| B．left；had come |
| C．had left；came |
| D．had left；would come |