Write the correct form of the verb BE in positive or negative forms. Use full forms.
8) Ko and Jacob (be) very smart. Ko (be) a scientist and Jacob (be) an engineer. 9) The library (be) open until 9:00 p.m. 10) The school (be) small. It (be, not) big. 11) The books (be) new. They (be, not) old. 12) Tommy, Steven, and Teddy (be) acting in the school play. 13) Beatrice (be) at her house. 14) It (be) hot outside. It (be, not) cold outside. 15) Judith (be, not) at home. She (be) at school.