【参考答案】
1、did you 【hear something crying】 in the house last night it was frightening
2、don't worry about me .i can do it 【by myself】.
3、i often hear the boy 【next door】play the violin.
4、the boy couldn't 【get out】of the fire without help.
5、could you teach us how to【 put out】 different kinds of fires?
6、dogs are usually lovely ,but you still should 【be careful with】 them.
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