Before the law was passed, the organization ________ do much to stop the pollution.
could
couldn't
can't
can
A dog is a _______ animal, whereas a wolf is a wild one
domestic
If we protect their habitat, these animals ________ coexist with humans peacefully.
could
can't
can
couldn't
In many national parks, you __________ feed the wild animals.
should
don't have to
shouldn't
have to
The vet treated the ______ animals before releasing them.
injured
The forest is the natural _______ of the grizzly bear.
habitat
If you want to help the environment, you __________ try to use less plastic every day.
shouldn't
should
have to
don't have to
The hikers ________ find their way back to the camp yesterday because the forest was too dark.
can
could
couldn't
can't
To protect something from harm or attack.
defend
To stay alive despite difficult conditions.
survive
In the past, the giant panda ________ survive easily in the wild, but now it needs human protection.
couldn't
can
could
can't
To be able to reach or get inside something.
access
Scientists __________ study for many years before they can lead a wildlife organization.
have to
shouln't
don't have to
should
We ________ save the coral reefs if we reduce ocean pollution immediately
couldn't
can't
can
could
A domestic cat ________ hunt as well as a wildcat because it is used to being fed by humans.
can
couldn't
can't
could
You __________ be a professional scientist to help protect nature; you can just pick up trash!
should
have to
don't have to
shouln't
Some owls ______ small mice during the night.
hunt
Last night, they had to ________ a young man that was left on an island.
rescue
We __________ destroy the natural habitats of endangered species if we want them to survive.
shoudn't
have to
don't have to
should
To live in the same place at the same time.
coexist
A group of people working together for a goal.
organization
A ________ is a nocturnal animal known for the black "mask" around its eyes.
raccoon
There is a ________ between siblings in the family.
conflict
If you see an injured bird, you __________ touch it with your bare hands; call a professional instead.
have to
should
shouldn't
don't have to