After the students had learnt about the benefits of recycling and reusing, they-.collecting waste paper, bottles, and cans tờ recycle and reuse A.h

By Charlie

After the students had learnt about the benefits of recycling and reusing, they…..collecting waste paper, bottles, and cans tờ recycle and reuse
A.had started B.Start C.Have stated D.Started
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  1. After the students had learnt about the benefits of recycling and reusing, they…..collecting waste paper, bottles, and cans tờ recycle and reuse

    A.had started

    B.Start

    C.Have stated

    D.Started 

    đây là cấu trúc của after

    after + QKHT, QKĐ

    Trả lời
  2. started

    Thì QKHT diễn tả một hành động xảy ra trước một hành động khác trong quá khứ

    Hành động “Start” ở đây là hành động xảy ra sau, chia thì QKĐ

    Trả lời

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