ответить на вопросы: i. открыть скобки: 1. the channel (to dredge) every five years. 2. we (to deliver) all the provisions by nine tomorrow morning. 3. i (to have) dinner before my watch began. 4. the captain just (to sign) the papers. 5. i (to do) my homework from 5 to 7 tomorrow. 6. who (to speak) in the corridor?

The channel dredge every five years. We will deliver all the provisions by nine tommorow morning. I have had dinner before my match began. The captain have just signed the papers. I will do my homework from 5 to 7 tommorrow. Who is speaking in the corridor?
P.S а на что ответить?