Walking alone in the dark，the boy whistled to ________ his courage.
| A．hold up | B．keep up |
| C．set up | D．take up |
178. There are four basic _____ of blood in the human body. What do you belong to, A, B, AB or O?
| A．kinds | B．sorts | C．types | D．Classes |
177. You should turn to Mrs. Green. She is the key figure in the company. The underlined part probably means _____.
| A．a person who has the key | B．a very important person |
| C．a new product__________ | D．a new policeman |
176. Three times the accused was brought to court for trail, he was sentenced half a year’s imprisonment by the _____.
| A．lawyer | B．official | C．officer | D．Judge |
175. I preferred to go there by plane, but I hadn't enough money to pay for the _______.
| A．trip | B．voyage | C．journey | D．Tour |
174. The teacher asked his students to help the old lady to do some housework and they made a good _____ of it.
| A．job | B．work | C．task | D．Justice |