20 câu Trắc nghiệm Tiếng Anh 12 Cánh diều Chuyên đề 18: Các loại mệnh đề (Clauses)
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By 1890, there were over 60 steamboats on the Mississippi River,______were quite luxurious. A. many of them B. many of which C. which many D. many of those

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By 1890, there were over 60 steamboats on the Mississippi River,______were quite luxurious. 

many of them

many of which

which many

many of those

Giải thích

Chọn đáp án B