Unit12 过去完成时一、用括号中所给单词的适当形式填空。1.I ( finish) homework before my mother came back last night.2. By the end of last term, we (learn) 1,000 new words.3. The train (leave) by the time I got to the station.4. The test (begin) when I arrived at school.5. My mother said that she (find)my lost keys.6. Only at that time did I realize I (make) a mistake.二、单项选择。1.(上海奉贤二模)By the age of 14,Su Yiming to train on the nation
