—Oh, come on. Just ___ . I’m very busy now!
--OK. To tell the truth, I need your help with my paper.
| A．take your time | B．don’t hesitate |
| C．come to the point | D．take your turn |
With more forests being destroyed, huge quantities of good earth _____ each year.
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
—Would you like to join us in playing the game?
—I’m sorry, but my homework ______ by now.
| A．hasn’t finished | B．hasn’t been finished | C．isn’t finished | D．won’t be finished |
Great as Newton was, many of his ideas _____today and are being modified by the work of scientists of our time.
| A．are to challenge | B．may be challenged | C．have been challenged | D．are challenged |
She tried hard to keep calm in face of the students, but the sweat on her forehead _____ her ____.
| A．gave; away | B．tuned; down | C．showed; out | D．shut; off |
Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known.
| A．improved upon | B．take down | C．put up | D．break away |