If you had gone (A) to bed early last night, (B) you wouldn’t have felt (C) so asleep (D) now.

Đáp án: C
Điều kiện loại trộn: If + S + had + P2 (+ yesterday, last night,..), S + would (n’t) + V(nguyên) + now/ right now/ today/...
Wouldn’t have felt → Wouldn’t feel
Dịch: Nếu tối qua bạn đã đi ngủ sớm, bạn sẽ không cảm thấy buồn ngủ như vậy.