57. James watt ____ the steam engine.
A: was inventing
B: invented
C: had invented
D: has invented
A: was inventing
B: invented
C: had invented
D: has invented
举一反三
- James Watt （）the steam engine in 1796. A: discovered B: had discovered C: invented D: had 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 invented the Spinning Jenny (珍妮纺纱机） 1785.
- ThiskindofTVsetisanewly_____machine. A: inventing B: invited C: invented D: invent
- ThiskindofTVsetisanewly___machine. A: inventing B: toinvent C: invented D: invent