高中英语：非谓语 分词

请分析每题的各个选项.详.（不一定要全部回答，满意者追加）

1.______ a teacher，I should set a good example to students.
A .Being B. Having been C.To be D.As I am being

2.Bing a teacher， one must first be their pupil.
A .Being B. Having been C.To be D.To have been

3.______,the work can be done much better.
A.Given more time B.We had been given more time
C.More time given D.If more time had given

4.______,tears ran down her pale face.
A.No word said B.Say no word
C.Not saying a word D.Without saying a word

5.Pelple always shake hands with each other when ______.
A.to introduce B.introduce C.introduced D.introducing

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