Đề thi chính thức Tiếng Anh vào 10 năm 2020-2021 (Đề 18)

The boy fell and hurt himself while he (play)___football.

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Put the verbs in parentheses in the correct tense.

The boy fell and hurt himself while he (play)___football.

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Giải thích

The boy fell and hurt himself while he was playing football.