I ______ tell you with certainty that he won’t be able to finish it before the deadline.
| A．will | B．must | C．can | D．may |
Once harm is _______ to the eco-system, all species will ________, including man himself.
| A．made; be in danger | B．done; be dangerous |
| C．caused; be endangered | D．done; be in danger |
The stamp on the letter is an art, from _______ we can get a lot of cultural knowledge.
| A．whom | B．which | C．them | D．those |
It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a few months.
| A．has been developed | B．is being developed |
| C．is developing | D．has developed |
Jenny nearly missed the flight ________ doing too much shopping.
| A．as a result of | B．on top of | C．in need of | D．in front |
If you receive a bunch of roses on Valentine’s Day, do you know what hidden meaning is _______ to it?
| A．put | B．introduced | C．attached | D．tied |