必背句型:

A:Why did he offer to give information to the police?
为什么他主动给警察提供信息？
B:When he offered to give information to the police,he was granted immunity from prosecution.
当他主动给警察提供信息时，他被免于起诉。
He offered to give information to the enemy.
他主动给敌人提供信息。
He offered to give help to the poor.
他主动给穷人提供帮助。
He was granted immunity from punishment.
他被免于惩罚。

延伸阅读:
A:What about the thief?
小偷怎么样了？
B:The thief surrendered himself to the police.
小偷向警方自首了。
The robber surrendered himself to the police.
抢劫犯向警方自首了。
They surrendered themselves to the enemy.
他们向敌人投降了。
Why did the person surrender himself to the police?
这个人为什么向警方自首？