Ⅰ.单句语法填空
1．(2015·高考安徽卷改编)Just as I got to the school gate，I realized I ____________ (leave) my book in the cafe.
解析：句意：我刚一到学校门口，就意识到我把书落在餐馆了。realized后省略了that，这里是一个宾语从句，从句时态与主句保持一致，“落下”的动作发生在“意识到”之前，应该用过去完成时。
答案：had left
2．(2015·高考北京卷改编)In the last few years，China ____________(make) great achievements in environmental protection.
解析：句意：在过去的这些年里，中国在环境保护中取得了很大的成就。由时间状语in the last few years可推知动作从过去一段时间持续到现在并对现在造成影响，用现在完成时。
答案：has made
