Chia động từ trong ngoặc ở thì quá khứ tiếp diễn. 1.Yesterday at six I (prepare) dinner. 2.I ( practise) the guitar when he come home. 3.We (not,cycle) all day. 4.Most of the time we (sit) in the park. 5.Marry (water) the flowers at 3.00 p.m yesterday. 6.They (visit) the zoo at ten o'clock yesterday. 7.At this time last year we (learn) English in London.

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