Fred is always ____ because he often does something good for his health outdoors.
| A．weak | B．nervous | C．serious | D．energetic |
Not only the two computer programmers but also their boss ______the murder.
| A．was charged with | B．was charged of |
| C．were charged with | D．were charged of |
--______great fun we had at the party last night!
--Yes, It was _________exciting a party that I would never forget it.
| A．How, such an | B．What, so |
| C．What a, such an | D．How a, so an |
We feel ______our duty to make our country stronger and stronger.
| A．it | B．this | C．that | D．one |
--The air pollution is terrible.
--It will be worse_______ we take action to protect the environment.
| A．if | B．unless | C．until | D．when |
--Which of the two sweaters will you take?
--I’ll take _____. They look nearly the same, and I just need one.
| A．both | B．either | C．none | D．all |