把句子翻译成被动语态

1.
A neo bridge was built by us over the river last year.
2.
似乎给被动语态至少有有个宾语吧？这句要么有点小问题，要么出题不严密……
（我假设他不严密…………）
Mr white teaches us in our school .
=>We are tought by Mr white in our school.

3.
The teacher was asked to tell a story by the pupils.

A new bridge was built over the river by us last year.
Some students is taught by Mr White in our school .
The teacher was asked to tell a story by the pupils.

第2句你是不是没写完整.

1A new bridge was built over the river last year.2We are teached by Mr. White in our school.第三句打不下了…