20 câu Trắc nghiệm Tiếng Anh 12 Cánh diều Chuyên đề 7: Liên từ (Conjunction)
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He was wearing glasses_________no one could see his face clearly. A. in order to B. so that C. unless D. so as

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He was wearing glasses_________no one could see his face clearly. 

in order to

so that

unless

so as

Giải thích

Chọn đáp án B