Chia động từ trong ngoặc cho đúng thì (Give correct tenses of the verbs) 1. Mary (be) ____________________ seriously ill since last night. 2. They sometimes (go) ____________________ school by bus. 3. How long __________ you (study) __________ English? - I (study) ____________________ it for 7 years. 4. We last (see) _____________ them last Sunday. 5. I (not meet) ____________________ him since he moved to Hanoi.

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