$45.$ He will be seen off at the airport by his family.

- S + will + be + V (Pii) + (by O).

$46.$ He's a dangerous man. He ought to be locked up.

- S + ought to + be + V (Pii) + (by O).

$47.$ Their weapons must be handed in.

- S + must + be + V (Pii) + (by O).

$48.$ Thuy's homework has to be finished tonight.

- S + has + to be + + V (Pii) + (by O).

$49.$ All her valuable jewelry was stolen last night.

- S + was/ were + V (Pii) + (by O).

$50.$ John has just been examined by a doctor.

- S + have/ has + been + V (Pii) + (by O).

$51.$ Those books will be returned to the library by Tom tomorrow.

- S + will + be + V (Pii) + (by O).

$52.$ Flight 202 from Miami has been delayed by bad weather.

- S + have/ has + been + V (Pii) + (by O).

$53.$ Milk is used to make butter.

$54.$ Your room must be kept tidy.

$55.$ She wasn't seen at the party last night.

- S + was/ were + V (Pii) + (by O).

$56.$ The regulation hasn't been changed by the government.

- S + have/ has + been + V (Pii) + (by O).

$57.$ I wasn't introduced to her parents.

- S + was/ were + V (Pii) + (by O).

$58.$ The window ought to be repaired.

$59.$ The most wonderful characters were created by Dickens.

- S + was/ were + V (Pii) + (by O).

$60.$ Milk is used to make yogurt by my mother.

$61.$ Those books aren't kept for reference.

$62.$ He was made to go out at once.

- S + was/ were + V (Pii) + (by O).

$63.$ The famous novel "Oliver Twist" was written by Charles Dickens.

- S + was/ were + V (Pii) + (by O).

$64.$ These exercises have to be done right away.

- S + have/ has + to be + V (Pii) + (by O).

$65.$ Has my parcel been posted?

- S + have/ has + been + V (Pii) + (by O).

$66.$ By whom was this window broken?

- S + was/ were + V (Pii) + (by O).

$67.$ This letter will be translated into Vietnamese.

- S + will + be + V (Pii) + (by O).