When he realized the police had seen him， the man ______ the exit as quickly as possible.
| A．made off | B．made for |
| C．made out | D．made up |
Chinese President Hu Jintao had had ______brief meeting with the three astronauts，who were going to board______country's third manned spacecraft Shenzhou Ⅶ on September 25,2008.
| A．the；a | B．a；a | C．a；the | D．the；the |
As the twentieth century came to a close，the raw materials for a great national literature were at hand，waiting ______.
| A．to use | B．to be used |
| C．to have used | D．to be using |
—What were you doing when I rang you this morning?
—I was occupied ______ the housework and kept my son occupied______ his homework.
| A．at；doing | B．with；doing | C．at；to do | D．with；to do |
By serving others，a person focuses on someone other than himself or herself，______ can be very eyeopening and rewarding.
| A．who | B．which | C．what | D．that |
Mr.Morse，who graduated from a famous medical university，spent years ______ his skills as a doctor.
| A．adapting |
| B．acquiring |
| C．occupying |
| D．concentrating |