Choose the right word for each gap.

1. The scientist who invented this device had great ... .

2. It took three attempts but in the end the scientist was able to ... his theory.

3. The sound of a humpback whale singing is ... .

4. The world’s need to pay attention to the ... of the humpback whales and help them survive.

5. Whales are ... creatures.

6. The international whaling commission introduced a ... on whale hunting.

7. Several issues were ... during the meeting.