Had the governments and scientists not worked together，AIDS﹣related deaths _______ since their highest in 2005．（ ）
| A． |
had not fallen |
| B． |
would not fall |
| C． |
did not fall |
| D． |
would not have fallen |
推荐试卷
Had the governments and scientists not worked together，AIDS﹣related deaths _______ since their highest in 2005．（ ）
| A． |
had not fallen |
| B． |
would not fall |
| C． |
did not fall |
| D． |
would not have fallen |
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