Trắc nghiệm Chuyên đề 6: grammar (find the mistakes) có đáp án

Ihaven’t visited my grandparents when we came to live in the city. A B C D

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I haven’t visited my grandparents when we came to live in the city.

                  A                                            B              C                       D

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Giải thích

Chọn đáp án B