trang was tired. however she went to the festival ( although)
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Although he studied hard he didn't pass the exam(however)
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the play was so boring . However, Hoa saw it from beginning to end
Although......................................................
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1.Although Trang was tired, she went to the festival ; 2.He studied hard. However, he didn't pass the exam ; 3.Although the play was so boring, Hoa saw it from beginning to end