Great efforts to increase grain production ________if food shortages are to be avoided.
| A．could be made | B．must be made |
| C．might be made | D．would be made |
难度: 中等查看答案及解析
The main issue at the APEC meeting was a climate – change plan ________by Australia’s Howard and backed by Bush.
| A．put out | B．put off | C．put away | D．put forward |
难度: 中等查看答案及解析