[Grammar] Can the "it " in "... whose task it is to ..." be ommited?

[on the way]

[FONT=&#23435] I wonder whether the "it" in "They are the volunteer workers whose task it is to help the elderly people in the neighborhood." can be deleted. Any reply will be much appreciated.[/FONT]

 

[Nicklexoxo]

I am not a native speaker, but I think that you could delete the word "it", but with it the sentence looks more completely for me. In my language you should use "-" instead "it". But I do not know a rule about punctuation marks in English.
Nickle.

 

[MikeNewYork]

I wonder whether the "it" in "They are the volunteer workers whose task it is to help the elderly people in the neighborhood." can be deleted. Any reply will be much appreciated.

Yes, feel free to delete it.