新概念第二册56课习题中
I got out.I wanted to have a look at the engine.
这个句子可以换成I got out to have a look at the engine.
请说出其重点要注意的地方.
另外本课习题中有这样一句话
Write two short paragraphs(of not more than two sentences each)completing the above phrases.
书中给出的意思是：用以上两个开头语写两小段话，每段不超过两句。
那么这句中completing怎么理解呢？