According to WHO, health care plans are needed in all big cities to prevent _________spread of AIDS.
| A．the ; the | B．the ;不填 | C．a ; a | D．不填; the |
After many years of hard work,Mary and her husband had at last paid ________all the money they had borrowed.
| A．for | B．out | C．in | D．off |
They thought the meeting was ________great importance.
| A．in | B．for | C．of | D．/ |
________the birthrate down by 10%,the number of the population has decreased.
| A．For | B．With | C．As | D．By |
The army went ________the thick forest and at last came to a little river.
| A．across | B．over | C．above | D．through |
You have made several mistakes in your exercises but ________you have done well.
| A．on the whole | B．except that |
| C．generally speaking | D．on the other hand |