The government is _____ and will take the necessary steps to maintain security and stability.
| A．on the alert | B．out of control | C．on guard | D．in vain |
The play __________ next month aims mainly to reflect the local culture.
| A．produced |
| B．being produced |
| C．to be produced |
| D．having been produced |
Nowadays people sometimes separate their waste to make it easier for it __________ .
| A．reusing |
| B．reused |
| C．reuses |
| D．to be reused |
Many buildings in the city need re-pairing, but the one __________ first is the library.
| A．repaired |
| B．being repaired |
| C．repairing |
| D．to be repaired |
His first book __________ next month is based on a true story.
| A．published |
| B．to be published |
| C．to publish |
| D．being published |
There were many talented actors out there just waiting __________.
| A．to discover |
| B．to be discovered |
| C．discovered |
| D．being discovered |