-Câu trả lời có 3 cách:
+ The last time he went to school was 2 days ago.
+ He hasn't gone to school for 2 days.
+ It's 2 days since he last went to school.
- Giải thích:
S + last+ V2+ time+ ago.
C1: The last time+ S+ V2+ was+ time+ ago.
C2: S+ has/have+not+ PII+ for+ time.
C3: It's+ time+ since+ S+ last+ V2.