Поставьте следующие предложения в страдательный залог: 1. mr. brown signed the contract. 2. he is showing his office now. 3. they will make their advertisement soon. 4. we had settled the question by that time. 5. the boss has just singed the contract.

1. The contract was signed by Mr. Brown.
2. His office is being showed now.
3. Their advertisement will be made soon.
4. The question had been settled by that time.
5. The contract has just been singed by the boss.