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问题: 将句子改为被动语态……急急急急急急急急急急急急急急

We shouldn't laugh at the disabled people
The disabled people _______ ______ _____ at

The cat terrified us in the dark last night
_______ ________ terrified by the cat in the dark last night

We often hear her singing songs next door
She _____ often ______ ______ songs next door

解答:

1.shouldn't be laughed
2.We ,were
3.is,heard singing