Before bridges were built, all transport across major rivers in the United States were by ferry boat.
Câu hỏi
Nhận biếtBefore bridges were built, all transport across major rivers in the United States were by ferry boat.
Đáp án đúng: C
Lời giải của Luyện Tập 365
were sửa thành was/had been
were sửa thành was/had been
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