1 . They work as ________(顾问) to a software company. (根据汉语提示单词拼写)

2 . She is a ___________(顾问) to the government.

3 . A firm employs my retired father as a _____(consult).

4 . Having worked with many _____(顾问), I know that a healthy environment is equally important. (根据汉语提示单词拼写)

5 . I think we have a moral _________ to help these countries.

A．invitation

B．consultant

C．responsibility

D．motivation