题目

Our brave soldiers would prefer to die rather than ___ to the enemy.  A. give up B. give in C. gave up D. to give in   答案：Bgive up和give in是两个比较容易混淆的词组。give in在这里的意思是“屈服；投降”。黄土高原人地矛盾尖锐，关键问题在于(　 ) A．植被破坏　 B．人口过度增长　 C．贫困　 D．环境恶化