They (work) _______________ very hard when they were young.10/10Give the correct form of the verbs in the blanket They (work) _______________ very hard when they were young.Nhập câu trả lời ở đây0/3000 ký tựGiải thíchĐáp án là: worked (câu chia thời quá khứ đơn vì có vế sau chia QKĐ).