---Peter, is this your pen?
---Yes, it's ________. Thanks a lot. I looked for it everywhere.
A. mine B. me C．I
----Are there ______ books in the box?
---Yes, there are ______.
| A．some, any | B．some, some |
| C．any, any | D．any, some |
--Sit down, please．--___________.
| A．Thank you. | B．Good morning． |
| C．Hello． | D．Goodbye |
Bill said nothing could stop him ______ his dream.
A. to achieve
B. from avoiding
C.from achieving
Mrs. Zhang advised us ______ the math problem in another way.
A. to solve B. solving C. creating
This kind of machine ______ cutting meat in big restaurants.
A. is used to
B. is made from
C. is used for