By the time he realizes he ____ into a trap, it’ll be too late for him to do anything about it.
| A．walks | B．walked | C．has walked | D．had walked |
The rice __ cut three weeks ago.
| A．was | B．were | C．has been | D．have been |
That farmer has many ___ on the farm.
| A．geeses | B．gooese | C．goose | D．geese |
Do you brush ___ every day?
| A．your tooth | B．your tooths | C．your teeth | D．teeth |
Many people are still in __ habit of writing silly things in __ puplic places.
| A．the…the | B．/…/ | C．the…./ | D．/…the |
Beyond ___stars, the astronaut saw nothing but ___ space.
| A．/…the | B．/…/ | C．the…/ | D．the…the |