As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.
| A．concerns | B．descriptions | C．catastrophe | D．emergency |
Why not look up the new word in a dictionary _____ you don’t know it ?
| A．if | B．that | C．though | D．whether |
No one is allowed ____ the room in the daytime..
| A．to be entered | B．to enter | C．entering | D．enter |
In the middle of the night, we ______signals for help from another ship.
| A．picked out | B．picked up | C．picked on | D．picked at |
Threehourswithyourgirlfriend_____tobeashorttime.
| A．seem | B．seems | C．isseeming | D．hasseemed |
One of the few things you __ _ say about English people with certainty is that they talk a lot about the weather.
| A．need | B．must | C．should | D．can |