${6.}$ The engine of the car has to be repaired.
→ bị động động từ khiếm khuyết "have to": S + have to + be + v3/ed +(by+O) + time
${7.}$ The window was broken and some pictures were taken away by the boys.
→ bị động QKĐ: S + was/were (not) + v3/ed +(by+O) + time
${8.}$ A lot of money is spent on advertising every day.
→ bị động HTĐ: S + is/am/are (not) + v3/ed +(by+O) + time
${9.}$ A story is going to be told by teacher.
→ bị động TLG: S + is/am/are (not) + going to + be + v3/ed +(by+O) + time
${10.}$ A cake is being cut with a sharp knife by Mary.
→ bị động HTTD: S + is/am/are (not) + being + v3/ed +(by+O) + time
