CET 4 4级作文 范句 范文

基本句型 一)原因 　　1.A number of factors are accountable for this situation. 　　A number of factors might contribute to (lead to )(account for ) the phenomenon(problem). 　　2. The answer to this problem involves many factors. 　　3. The phenomenon mainly stems from the fact that... 　　4. The factors that contri