5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 68
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It was not long before a helicopter arrived. It arrived_______ a. after b. soon afterwards c. behind

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It was not long before a helicopter arrived. It arrived_______

after

soon afterwards

behind

much later

Giải thích

Chọn đáp án B