The world is full of wonders, _____ we open our eyes to see them．
A． if only B． as if C even if D． only if
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 |
Biology is ___.
| A．science of life | B．science of the life | C．the science of the life | D．the science of life |