I was on the highway when this car went past fol. Lowed by a police car. They ______ at least 150 kilometers an hour.
| A．should have been doing | B．must have been doing |
| C．could have done | D．would have done |
The World Health Organization gave a warning to the public without any______when the virus of H1N1 hit Mexico in April, 2009.
| A．delay | B．effort | C．schedule | D．consideration |
In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.
| A．signal | B．chance | C．mark | D．measure |
My ______ of this weekend’s activity is going out with some good friends.
| A．idea | B．opinion | C．mind | D．thought |
To make members of a team perform better, the trainer first of all has to know their _____ and weaknesses.
| A．strengths | B．benefits | C．techniques | D．values |
What’s the _____ of having a public open space where you can’t eat, drink or even simply hang out for a while?
| A．sense | B．matter | C．case | D．opinion |