Don’t bother Tom, he is ______ with the experiment on water molecules in the lab.
| A．focused | B．fixed | C．occupied | D．concentrated |
He told her of his ________ experience in the hurricane.
| A．frightening | B．frightened |
| C．interesting | D．interested |
It is hard for the firefighters to get ________ to the burning building.
| A．closely | B．closed |
| C．close | D．closing |
Dr. White has rich _________ in dealing with the children who have had bad _________.
| A．experience; experiences | B．experiences; experience |
| C．experience; experience | D．experiences; experiences |
With the Spring Festival coming, the _________ in the street becomes more and more delightful.
| A．air | B．surrounding |
| C．environment | D．atmosphere |
This English dictionary is expensive, but it is of ________.
| A．useful | B．great use |
| C．no use | D．useless |