Fill in the blanks with collective noun:
1. A _________ of people attacked the chain snatcher
2. Our pet cat gave birth to a _________ of kittens.
3. Rohit could not find the ________ of keys.
4. A _______ of bees hovered over our head.
5. A _______ of dogs was barking in the park.
6. My parents played a game with a _______ of cards.
7. The man carried a ______ of sticks on his head.​