Can you see______11-year-old boy and ______one-year-old cow in the field?
| A．a; an | B．an ; a | C．a; a | D．an ; the |
— If we go on wasting water like this, we’ll _______ soon.
— Yes, you’re right. We should try our best to save it.
A. mix it up
B. use it up
C. use up it
There is a cat _______ a dog.
A. chase B. chased C. chasing
Mike, do you know which CDs belong to _______?
A. my B. ours C. us
It’s reported that a tiger escaped _______ the zoo yesterday.
A. in B. on C. from
The work is so difficult that I don’t know _______ to do it.
A. what B. how C. where