We can plant more ____________.
| A．trees and grass |
| B．tree and grass |
| C．tree and grasses |
Count the ________. How many? One _______. ( )
| A．duck…duck | B．pigs…pig | C．chicks…chicks |
My parents are _________. They work on a _________. ( )
| A．farmer, farm | B．farm, farmer | C．farmers, farm |
In the past, the writer used _________ to write. ( )
| A．pen and paper | B．a pen and paper | C．pens and papers |