To protect the environment, the local government has ______ a lot of signs to warn the citizens not to litter the ground.
| A．add up | B．take up |
| C．set up | D．put up |
Alice received an invitation from her boss，__________ came as a surprise.
| A．it | B．that | C．which | D．he |
Paper is __________ great Chinese contribution to human civilization.
| A．a | B．the | C．不填 | D．an |
Read this story，__________ you will realize that not everything can be bought with money.
| A．or | B．and | C．but | D．so |
It was __________ that we wanted to stay here for another two days.
| A．such fine weather | B．such a fine weather |
| C．so fine weather | D．so fine a weather |
The suspect's fingerprints on the gun were the main __________ against him.
| A．crime | B．information |
| C．evidence | D．conviction |