James Watt （）the steam engine in 1796.
A: discovered
B: had discovered
C: invented
D: had invented
A: discovered
B: had discovered
C: invented
D: had invented
举一反三
- 57. James watt ____ the steam engine. A: was inventing B: invented C: had invented D: has invented
- James Watt invented the steam engine. A: 詹姆斯.瓦特发明了那台蒸汽机。 B: 詹姆斯.瓦特发明了蒸汽机。
- James Watt created a Steam Engine in 1769.
- ItwasDr.Rontgenwho（）X-rays. A: discovered B: invented C: madeup
- James Watt invented the Spinning Jenny (珍妮纺纱机） 1785.