Write on the blank whether the following sentences are compound or complex.
1. The teacher speaks but some pupils do not listen.
2. The policeman whistles and the driver stops.
3. Mrs. Enriquez noticed that the school compound was unswept and disorderly so she
talked to the janitor about it.
4. Some insects are harmful to orchids but other insects like the bees and butterflies are
useful to them.
5. She went to the store in order to buy materials for a project.