${1.}$ Letters are typed in the office by Mary .

→ bị động HTĐ: S + is/am/are (not) + V3/ed + (by+O) + time

${2.}$ Human life has been completely changed by science and technology.

→ bị động HTHT: S + have/has (not) + been + V3/ed + (by+O) + time

${3.}$ This bottle was broken by Peter.

→ bị động QKĐ: S + was/were (not) + V3/ed + (by+O) + time

${4.}$ English is being learnt in the room by them.

→ bị động HTTD: S + is/am/are (not) + being + V3/ed + (by+O) + time

${5.}$ Her telephone number isn't known by me.

→ bị động HTĐ

${6.}$ I was sent a present last week.

→ bị động QKĐ

${7.}$ We were given more information by her.

→ bị động QKĐ

${8.}$ Some of my books have been taken away.

→ bị động HTHT

${9.}$ Why wasn’t he helped ?

→ bị động QKĐ

${10.}$ How many games have been played by the team ?

→ bị động HTHT