Ⅰ.语法单句填空
1．(2012·辽宁改编)Leave your key with your neighbor ______ you lock yourself out one day.
答案：in case 本题考查连词的用法。句意：留一把钥匙给你的邻居，以防某天你把自己锁在外面。in case“以防，万一”。
2．Hard ________ they tried, they couldn't make her change her mind.
答案：as 考查as引导让步状语从句。as使用让步状语从句，使用部分倒装，其倒装结构为：过去分词、形容词、名词、副词、动词原形＋as＋主语＋系动词。句意：尽管他们努力劝说，还是不能改变她的心意。
3．—I reminded you not to forget the lecture.
—So you ________.
答案：did 考查学生对“so＋主语＋助动词”结构的掌握情况。 句意：——“我提醒你不要忘记这个讲座。”——“你确实提醒了。”“so＋主语＋助动词”表示对某人说法的认可。
4．A turning point of the continuously high housing price won't appear suddenly because there must be a certain process ______ many factors lead to the change.
答案：where 考查定语从句。分析句子成分可知，“______ many factors lead to the change”是定语从句，a certain process为先行词，表示抽象地点，在从句中作地点状语，故空处用where。
