----- Nội dung dịch tự động từ ảnh -----
Exercise 1: Use the verbs in brankets in the past perfect.
1. Why did Tom's mother get angry with him?
Because he (break) .
. her favourite vase.
2. When did you watch TV last night?
When I (do). . all my homework.
3. Did you first see them at my last birthday party?
No, I (meet). . them before.
4. Why did she return home ?
She suddenly remembered she (not, turn off).. the gas stove.
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