Fill each gap with a suitable collective noun.

1. There are swarms of mosquitoes in the forests in Scandinavia in the summer.
2. As we looked into the water, we saw a of brightly coloured fish.
3. There was a of youths on the corner; they didn’t look very friendly.
4. There’s a of cards on the bookshelf. Will you fetch them for me, please?
5. A of biologists is studying marine life in this area.
6. Look at that of birds on that tree. Both of them have beautiful markings. I wonder what they are?
7. Could you put a of spoons of sugar in this coffee for me, please? It’s very bitter. Yes, just two, that’s fine. Thanks.