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 |
相关试题
一Everybody is going to climb the mountain. Can I go too, mum?
-Wait till you are old enough, dear．
| A． |
will you? |
B． |
Why not? |
C． |
I hope so |
D． |
I'm afraid not |
The little boy won't go to sleephis mother tells him a story．
| A． |
or |
B． |
unless |
C． |
but |
D． |
whether |
Just be patient .You__________expect the world to change so soon
A ca
n’t B needn’t C may not D will not
When you are home，give a call to let me know yousafely．
| A． |
are arriving |
B． |
have arrived |
C． |
had arrived |
D． |
will arrive |
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