But for friction, people _________ neither walk, nor even stand up.
A: can
B: were able
C: will be able
D: could
A: can
B: were able
C: will be able
D: could
举一反三
- He ________ after the accident. A: could neither stand nor walk B: neither stands nor could walk C: could neither standing nor walking D: could neither stand nor walked
- 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
- Were it not for friction (摩擦力), we ______walk on this earth of ours. ( ). A: were not able to B: should not have been able to C: would not be able to D: are not able to
- 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
- Neither my aunt nor my cousins were able to explain their behavior.