___________ that English is so important in work and life now, I would have devoted more time and energy to my English study.
A: Should I know
B: Should I have known
C: Had I known
D: Have I known
A: Should I know
B: Should I have known
C: Had I known
D: Have I known
举一反三
- If I _____ the challenges at that time, I might not have started my own business. A) would know B) have known C) had known D) will know A: B: C: D:
- —The bus should take one hour and a half to get to the airport! I almost missed the flight! —______ you were leaving today, I would have drove you there. A: Have I known B: I have known C: Had I known D: I had known
- If I had attended the meeting, I ________ the decision now. A: A will know B: B would know C: C will have known D: D would have known
- ______ the result, I would not have asked you to tell me. A: If I know B: Had I known C: I had known D: If I knew
- I would have sent you these photos if I _______your email address. A: had known B: know C: have known D: knew