$\text{1. Bottles of milk are brought to houses by the milkman.}$

$\text{→ Bị động HTĐ is/am/are V3/ed}$

$\text{2. How are languages learnt ?}$

$\text{→ Câu bị động thì HTĐ : S + be + VPII + by + O}$

$\text{3. I will be collected at the airport by John.}$

$\text{→ Bị động TLĐ will be V3/ed}$

$\text{4. The cheque must be signed by the manager.}$

$\text{→ Bị động must be V3/ed}$

$\text{5. I was kept waiting for half an hour.}$

$\text{→ Bị động QKĐ was/were V3/ed}$

$\text{6. A new ring road is being built round the city.}$

$\text{→ Bị động HTTD is/am/are being V3/ed}$

$\text{7. Jeans can't be worn at work.}$

$\text{→ Bị động can't be V3/ed}$

$\text{8. Will she be invited to your birthday party?}$

$\text{→ Bị động TLĐ will S be V3/ed?}$

$\text{9. A new hospital has been built near the airport.}$

$\text{→ Bị động HTHT have/has been V3/ed}$

$\text{10. French and English are spoken in Canada, aren't they?}$

$\text{→ Bị động HTĐ is/am/are V3/ed → Vế giới thiệu khẳng định → Câu hỏi đuôi phủ định.}$