单项选择 适中0.65 引用1 组卷218
__________the AI robots __________earlier, the production efficiency would have been improved.
| A．Were; invented | B．Had; been invented |
| C．Had; invented | D．Have; been invented |
18-19高二上·江苏连云港·期末
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She wouldn’t have flown off the handle _____the fact that you didn’t intend to hurt her.
| A．were she to know | B．had she known |
| C．did she know | D．should she have known |
Had it not been for your timely assistance in giving me first aid, I fear that the consequences more serious.
| A．might be | B．must have been | C．must be | D．might have been |
Through this incident, both of us have become better people. However, if I _______our friendship, we would have both learnt nothing.
| A．ended | B．has ended |
| C．had ended | D．ends |
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