Can't find the Standard Asset Packages on my Unity 2017.1.1f

A tutorial I’m following told me to import a physic package by going to
Assets → Import → Characters. (pic1)
The problem is I don’t even have a submenu.
The only option under import is
Assets → Import → Custom Package… (pic2)

as far as I know I must import standart asset from asset store & it import all of them.
including files I do not use.

@DoTA_KAMIKADzE

I’m fairly certain the standard assets is available for redownload in the asset store. Try that and access the Character folder in there.