问题
选择题
He failed the exam, ______ he tried his best.
A. because B. though C. So
答案
答案：B
题目分析：句意为：虽然他尽力了，但是还是考试不及格。because：因为，though：虽然……但是……， So：因此。根据句意可知应选B。
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He failed the exam, ______ he tried his best.
A. because B. though C. So
答案：B
题目分析：句意为：虽然他尽力了，但是还是考试不及格。because：因为，though：虽然……但是……， So：因此。根据句意可知应选B。