she was very tired, she helped her brother with his homework9/14Choose the best answer to complete these following sentences. _____ she was very tired, she helped her brother with his homework.BecausewhetherAlthoughsoGiải thíchĐáp án C Dịch: Dù cô rất mệt mỏi, cô giúp anh trai làm bài tập về nhà.