This is an important problem.   &n Wap版

试题详情及答案解析: This is an important problem. Please .
A. write it down
B. write down it
C. write it i; 答案：A; 试题分析：句意：这是个重要的问题，请记下来。Write down记下来，宾语放在中间。故选A。
考点：考查动词短语。