A: Was there
B: Were there
C: There was
D: If there was
举一反三
- Weighing five hundred pounds, ______. A: the cupboard could not be moved. B: she could not move the cupboard. C: the cupboard was too heavy for one person to move. D: the cupboard was unable to move.
- （）no friction between the surface of the road and our feet, we could not walk at all. A: If there was B: Were there C: Was there D: There was
- But for friction, people _________ neither walk, nor even stand up. A: can B: were able C: will be able D: could
- Without friction, there could be no brake.
- The room was so full of___it____difficult to move. ( ) A: furnitures…were B: furnitures…was C: furniture…were D: furniture…was
内容
- 0
Which sounds can disappear?Stand still. Don’t move. A: The d in stand and the t in don’t. B: The d in stand and the v in move. C: The d in stand, the t in don’t and the v in move. D: The t in don’t and the v in move
- 1
The automobile engine is an internal combustion engine which converts the heat energy of fuel into mechanical energy to make the car move.
- 2
They ______play the piano when they were young.(could/be able to) A: could B: were able to C: was able to D: could/were able to
- 3
Were it not for friction, we ( ) walk on this earth of ours. A: should not have been able to B: would not be able to C: were not able to D: are not able to
- 4
lubrication A: adding a substance between solid surfaces that are moving against each other in order to reduce friction and wear. B: the process of making the fuel start to burn in an engine so that a vehicle can start to move. C: a force which slows down a moving object or vehicle. D: the force that makes it difficult for things to move freely when they are touching each other.