What is the main idea of this selection?
A
Newspapers like to stir up controversy over past history.
B
Man's inhumanity to man continues despite the
Holocaust.
C
Persistence in learning about one's heritage and
ancestors pays off.
D
Something gained unlawfully can never be enjoyed to its
fullest.

The authors use the word “backbone” in lines 3 and 39 to indicate that

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.

When do you think it’s best to take the psat (what grade year / when in the year)?