5. Active or passive? Choose the correct verb form. 1. The book (wrote/was written) by Hardy. 2. Four people (have killed/have been killed) in a train crash. 3. A famous architect (was built/built) the bridge.

В предложениях выбираем залог по смыслу: если действие направлено на подлежащее, используется Passive Voice.

1. The book was written by Hardy.
2. Four people have been killed in a train crash.
3. A famous architect built the bridge.

Ответ: 1) was written; 2) have been killed; 3) built.