The streets are all dry. It _____ during the night.
| A．must have rained | B．should have rained |
| C．can’t have rained | D．couldn’t rain |
. ---I am green at everything.
---Don’t worry. _____ you get older, you get more experience.
A .When B. Till C. As D While
The men will have to wait all day _____ the doctor works faster..
| A．if | B．unless | C．whether | D．that |
I often have conversations with John over _____telephone, while I keep in touch
with Tom by _____letter.
| A．/; the | B．the; / | C．/; a | D．the; a |
. ---Would you mind my sitting on the seat beside you, sir?
---______.
| A．Sure, with pleasure | B．Yes, help yourself |
| C．I’m sorry, but it’s taken | D．Well, never mind |
This kind of stone _____ cool in summer and warm in winter.
A. is being felt B. is felt C. feels D has been felt