15. The hiding man made a hole in the wall ______ he could observe the outside.
| A．in which | B．by which | C．through which | D．with which |
)According to __________ World Health Organization, health care plans are needed in all big cities to prevent __________ spread of AIDS.
| A．the; 不填 | B．the; the | C．a; a | D．不填; the |
For him __________ stage is just __________ means of making a living.
| A．a; a | B．the; a | C． the; the | D．a; the |
Of all __________ reasons for my decision to become a university professor, my father’s advice was __________ most important one.
| A．the; a | B．不填; a | C．不填; the | D．the; the |
— I knocked over my coffee cup. It went right over __________. — You shouldn’t put drinks near __________ computer.
| A．the; 不填 | B．the; a | C．a; 不填 | D．a; a |
Everybody thinks little of the film．In fact，there is no__ of it being tried out in the film festival．
| A．sign | B．use | C．possibility | D．doubt |