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 |
The sleeping baby would be scared ________ a sudden loud noise.
| A．was there | B．there was |
| C．should there be | D．there should be |
—Mum, I'm tired.
—Well, if you ________ go to bed after midnight every night, what do you expect?
| A．will | B．may |
| C．should | D．can |
Brain, like muscles, also needs some kind of exercise and nutrition. The more you use your brain in the right direction, the more you ________ enhance your ability.
| A．could | B．might |
| C．shall | D．will |
We all know that we ________ our carbon footprint, but I suspect that many people wouldn't be prepared to go as far as Joan Pick, a retired scientist living in south London.
| A．must have reduced | B．should have reduced |
| C．may have reduced | D．could have reduced |
No matter how healthy you ________ be, you need to consult a doctor from time to time.
| A．should | B．will |
| C．must | D．may |