课时跟踪检测(六) learning about language & using language ⅰ.句型转换 1．i came across her quite by chance in oxford street. →i came across her quite by accident in oxford street. 2．i made my promise that i would help him no matter what happened. →i promised to help him whatever happened. 3．he can not explain his failure in the english examination. →he can not account for his failure in the english examination. 4．she didn't remember her appointment with the doctor
