题目

You are certain to live your dream ____ you make great efforts and lay emphasis on improvements in efficiency. A． on condition that              B． as far as C． even though D． in case   答案：A  考查词组辨析。on condition that表示|“只要……”；as far as表示“就……”；even though表示“即使……”；in case则表示“万一，以免”。根据语意“只要努力……你肯定能实现梦想”可知选A项。   在□ABCD中，如果∠A与∠B的度数之比是1∶2，那么∠C＝________°，∠D＝________°．