摘要： light bulb
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Light bulb which was invented by Edison ________ now．
- A.was widely used
- B.is widely used
- C.will be widely used
- D.used widely
Light bulb which was invented by Edison _________now.
[ ]
A. was widely used
B. is widely used
C. will be widely used
D. used widely
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B. is widely used
C. will be widely used
D. used widely
Light bulb which was invented by Edison ________ now．
[ ]
A．was widely used
B．is widely used
C．will be widely used
D．used widely
The light bulb ______ by Edison in the middle of the 1780s.
| A．is invented | B．was invented | C．invented | D．invent |