---_________ did your uncle leave his hometown?
---He ________ for about twenty years.
| A．When, has left | B．When, has been away |
| C．How long, has left | D．How long, has been away |
--- It is very cold this winter.
---Yes, but it was colder last winter, I remember.
A. already B. even C. more
I think _is impossible for me to climb such a high mountain.
A. it B. this C. that
Let's stop for a few minutes. I'mtired to walk any farther.
A. so B. enough C. too
--- __salt did you put in the soup?
--- None. I forgot.
A. How much B. How many C. How long
I had a good time my stay in Chengdu this summer vacation.
A. on B. during C. in