Ex:3 p:49 Find the numbers below in the article and explain what they refer to

1. Have we just received the SOS signal from an unknown ship?
2. Have the sailors scrubbed the deck lately?
3. Has the ice-breaker already conducted the cargo ship Gotland to the port?
4. Have they visited the Kremlin today?
5. Have we studied how to navigate sailing boats?
1. We have not just received the SOS signal from an unknown ship.
2. The sailors have not scrubbed the deck lately.
3. The ice-breaker has not  conducted the cargo ship Gotland to the port yet.
4. They have not visited the Kremlin today.
5.We have not studied how to navigate sailing boats.