8. Choose the correct form of the verb.1. The number of days in a week is/are seven.2. A number of streets in our city is/are still known by their old names.3. The number of workers in our group at the camp was/were six.
The number of days in a week is seven.A number of streets in our city are still known by their old names.The number of workers in our group at the camp was six.