______ no friction, an automobile could not move.
A: Was there
B: Were there
C: There was
D: If there was
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