It is well known that Tomas Edison ______ the electric lamp.
A: discovered
B: developed
C: found
D: invented
A: discovered
B: developed
C: found
D: invented
举一反三
- It was well known that Thomas Edison _____ the electric lamp.
- 18.Edison__________the electric bulbs over one hundred years ago. A: found B: discovered C: thought D: invented
- He ____________ a new game, but it never really caught on. A: found B: discovered C: invented D: created
- We ______ that he is quite untrust--worthy. A: have found B: have discovered C: have invented D: have looked for
- James Watt （）the steam engine in 1796. A: discovered B: had discovered C: invented D: had invented