1 . Had those customers___（预定） in advance， they wouldn't be standing in line now. （根据中文提示填空）

2 . If you had told him the truth, he might have made some suggestions. (句型转换)
             you            him the truth, he might have made some suggestions.

3 . 按照要求转换句子
1. Had you followed your father's advice，you would be much better now.（if条件句）
_________________________________________________________________________________________
2. If you had not helped me，I would have failed.（含蓄虚拟条件句）
__________________________________________________________________，I would have failed.
3. If I were a teacher，I would have opportunities to teach lots of students.（省略句）
__________________________________________，I would have opportunities to teach lots of students.
4. If we had set off yesterday，we would be lying on the beach of Hawaii，enjoying the sunshine right now.（省略句）
_______________________，we would be lying on the beach of Hawaii，enjoying the sunshine right now.
5. I didn't learn French so I am not able to interpret for him now. （错综虚拟条件句）
________________________________________________________________________________________

4 . We would have won if we had trained harder.（句型转换）
___________ we __________ harder, we would have ___________.

5 . It seems that we have to accept the result and make a good preparation to have another try.
                      earlier, I could have done something to avoid this accident. (inform)
看来我们必须接受这个结果并做好再次尝试的准备了。要是我早点得知的话，就可以做些什么来避免这场事故了。

6 . ________the governments and scientists not worked together，AIDS－related deaths_______since their highest in 2005.
如果政府和科学家不共同努力，艾滋病相关的死亡就不会从2005年的最高点下降。