Plural/Singular nouns

Choose the correct verb form

1. €100
   [was|were] too much for the jacket.
2. Chicken pox
   [is|are] a common childhood illness.
3. Chinese
   [is|are] difficult to learn.
4. Many foods
   [contain|contains] traces of nuts.
5. Many people
   [like|likes] to drink coffee in the morning.
6. My advice
   [is|are] to take the job.
7. My family
   [is|are] very large.
8. Some children
   [has|have] very bad manners.
9. That bunch of grapes
   [look|looks] delicious.
10. There
    [was|were] water everywhere.
11. The United States
    [is|are] a big country.
12. Those trousers really
    [suit|suits] you.