根据所给句子的意思，填上合适的单词，并注意其正确形式, 首字母已给出。

小题1:Wang Wei is very stubborn, so it is not easy for her to change her m___________.

小题2:If you have some trouble, you can go to the teacher for a_________.

小题3:Though he is a n________ English speaker, he can’t speak English very fluently.

小题4:I don’t think it was an accident at all. Your brother did it on p____________.

小题5:I was very excited. It took me some time to c______ down myself.

查字典，再填空。

1．“亡羊补牢”中的“亡”指的是                ；“牢”指的是                   。这个成语的意思是              

                                        。这个故事告诉我们：                                                                               。

2．“南辕北辙”中的“辕”指的是             ；  “辙”指的是              。这个成语的意思是                   

                                       。这个故事告诉我们：                                                                                。