Mr.Morse，who graduated from a famous medical university，spent years ______ his skills as a doctor.
| A．adapting |
| B．acquiring |
| C．occupying |
| D．concentrating |
-Did you have any trouble with the customs officer?
-________ to speak of.
| A．No | B．Nothing | C．None | D．Neither |
We ________ last night , but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
They tried to find a table for two. But they were all _____.
| A．given away | B．kept away | C．taken up | D．used up |
Over two thirds of the population were believed to have no ______ to the health care in the west rural area in China.
| A．aid | B．basis | C．belief | D．access |
You should look _______ into the matter to get more information about it.
| A．farther | B．far | C．farthest | D．further |