1,the secretary often locks the ofice every morning
=> the ofice often is locked by ,the secretary every morning
2,we must do our homeword now
=> our homework must be done now
3,they gave that letter to me
=> that letter wa given to me
4, mis hong teacher us english
=> we are taught english by miss hong
5,they dried the beans in the sun
=> the beans was dried in the sun
6,he discovered aspirin in 1889
=> aspirin was discovered in 1889
7,the french presented the statue of liberty to the american in 1886
=> the statue of liberty was presented to the american by the french in 1886