高中英语语法：定语从句

D。句子意思是：生活是一场长跑,我们通过与他人竞跑去超越自我。we compete with others in a long race to go beyong ourselves。你平时做题可以这样掉转语序思考。句子中缺少了in,所以用where,life is like a long race where we compete with others = life is like a long race in which we compete with others。