American's first satellite exploded before it had risen three and a half feet off the ground.
Câu hỏi
Nhận biếtAmerican's first satellite exploded before it had risen three and a half feet off the ground.
Đáp án đúng: B
Lời giải của Luyện Tập 365
before sửa thành after
before sửa thành after
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