1. They bought some flowers for the opening ceremony yesterday
–> Some flowers
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$\text{Answer:}$ Some flowers were bought for the opening ceremony yesterday.– Bị động thì QKĐ:-> S + was/were + VPII + by + O– Some flowers là S(số nhiều) -> dùng werecolor[pink][#ANGELRED]
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$\text{–> Some flowers were bought for the opening ceremony yesterday }$ $\\$ Câu bị động thì quá khứ : S + was/were + P(II) + …. + by $\\$ Dịch : Một số hoa được mua cho lễ khai mạc ngày hôm qua
