1 . 我认为有些错误在所难免，关键是我们要从中吸取教训。(impossible)
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2 . 王老师常常提醒我们遇到困难要向他寻求帮助别犹豫，这就是我们把他当朋友的原因。（remind）

3 . 句型转换
1. She asked her husband, “What are you going to buy for our daughter?”
She asked her husband _________ _________ _________ _________ _________ buy for _________ daughter.
2. He was ill yesterday. This is why he didn’t come.
He didn’t come yesterday. That _________ _________ _________ _________ _________.
3. I insist on your taking immediate action to put things right.
I _________ _________ you _________ immediate action to put things right.
4. Not until he finished his homework did he go out to play.
It _________ _________ _________ he finished his homework _________ _________ _________ out to play.
5. Since he was alone, he didn’t find it interesting walking along the long river by himself.
It’s _________ _________ walking along the long river by himself.

4 . The reason ______he didn't come was ______he was ill.

A．why; that	B．that; why
C．for that; that	D．for which; what