You can download a copy of "Our common Bond" from here
https://immi.homeaffairs.gov.au/citizenship-subsite/files/our-common-bond.pdf
Also if you visit any council library , you can borrow a copy of this.
To practice test, there are many online resource available including below.
https://immi.homeaffairs.gov.au/citizenship/test-and-interview/prepare-for-test/practice-test