C. Fill in the blanks by using the correct singular or plural word from the clues given below:
lice, fish, masses, zero, ratio, news, mouse, teeth
1. Masses of people attended the meeting.
2. You should brush your teeth daily.
3. Did you catch any fish?
4. No news of the terrorist attack is correct.
5. Lice live on people's skin and in their hair.
6. It was ten degrees below zero last night.
7. The school has a very high teacher-student ratio.
8. The cat has caught another mouse.