Câu 37: I didn’t know that Lam had to get up early, so I didn’t wake him.
A. If I had known that Lam had to get up early, I would have woken him up.
B. If I know that Lam have to get up early, I will wake him up.
C. If I knew that Lam had to get up early, I would wake him up.
D. If I knew that Lam had to get up early, I would have woken him up.
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