请根据要求改写下列句子，每空一词。

小题1:The doctor asked the old man to stop smoking. (改为一般疑问句)

________ the doctor ________ the old man to stop smoking?

小题2:The girl is clever. She can work out difficult problems. (合并为一句)

It is clever _________ the girl _________work out difficult problems.

小题3: I prefer doing everything for myself to asking my mother for help. (保持句义基本不变)

I would _________ do everything for myself _________ ask my mother for help.

小题4:Those local businesses supported the charity show. (改为被动语态)

The charity show __________   _________ by those local businesses.

小题5:Martin was so excited at the news that he couldn’t fall asleep. (改为简单句)

Martin was _________ excited at the news _________fall asleep.

将Fe粉、Cu粉、FeCl₃溶液、FeCl₂和CuCl₂溶液，混合于某容器中充分反应（假定容器不参与反应），试判断下列情况下溶液中存在的金属离子和金属单质。

（1）若铁粉有剩余，则容器中不可能                       ；

（2）若氯化铜有剩余，则容器中还可能有                            ；

（3）若氯化铁和氯化铜都有剩余，则容器中不可能有             ，  可能有              。

（4）若氯化铁有剩余，则容器中不可能有                  。