There is ____ Mr. Smith at the door who wants to speak to you.
| A．a some | B．certain | C．some a | D．a certain |
Snow is rare in this area. You can hardly see any snow, ________ it is winter.
| A．ever since | B．now that |
| C．even though | D．even so |
The prices have been rising all the time, especially that of housing. So it is high time the government _______ action to solve it.
| A．takes | B．have taken | C．took | D．to take |
— So much work needs to be finished in such a short time.
— _________ I’ll give you a hand.
| A．Not to worry. | B．So what? |
| C．You can’t be too careful! | D．That’s right. |
. _________ the wind and the sun, the color on the board gradually ran.
| A．Being exposed to | B．Having exposed | C．Exposing | D．Exposed to |
________ no modern technology, the Egyptians had to move each stone by hand.
| A．It being | B．There being | C．There was | D．Being |