题目内容
7．-China develops so fast．-That's true．It ______ a lot already．（ ）
| A． | changes | B． | changed | C． | will change | D． | has changed |
分析 -中国发展得如此快．
-那是真的，它已经改变了很多．
解答 答案：D 根据副词already可知，要用现在完成时态；现在完成时态的结构为have/has+动词的过去分词．主语是it，所以助动词用has，故选D．
点评 判断动词的时态，要通过所给的时间状语、提示词或语境去判断动词存在的状态．此题根据关键词判断．
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