Did you know any French before you arrived in Washington?——Never ____ it, actually.

下列各句中划线字活用情况不同于其它三项的是

_____ going to the program “If you are the one”, he was rather concerned about being turned down in public.

People will have ______ free time and ______ housework to do in the future because robots can help a lot.

Aren’t Sam and Helen in Class Three —_______.