Đáp án: `+` Giải thích các bước giải:

`20)` Our written work was returned to us by the teacher

`21)` For the time being, that group is being taught by Alice 

`22)` The other members are being called by John

`24)` Who is being kept in the kitchen`?`

`25)` What books are being read this year `?`

`26)` The cows are being milked by Nam

`27)` The car is being washed by my father

`28)` A cup of tea is being drunk by Sheila

`29)` The cake is being cut with sharp knife by Mary

`30)` The mail is being delivered by the mailman now

`32)` The palace was being designed by a French architect

`***` Notes:

`-` Bị động QKĐ: S + was/were + Ved/ Cột `3` + ( by + O)

`-` Bị động HTTD: S + am/is/are + being + Ved/ Cột `3` + ( by + O)

`-` Bị động QKTD: S + was/were + being + Ved/ Cột `3` + ( by + O)

`color{pink}{#NTP}`