In many national parks, visitors __________ stay on the marked paths. It is a strict rule to protect the plants.
have to
You __________ pay a lot of money to help animals; even small lifestyle changes can make a difference.
don't have to
Correct a mistake: To save the sea turtles, we should to stop throwing plastic in the ocean.
To save the sea turtles, we have to stop throwing plastic in the ocean.
We __________ protect the habitats of tigers if we want them to survive. It is necessary for their survival.
have to
Correct a mistake: You shouldn't to touch the animals in the wild; it can be dangerous for them and you.
You shouldn't touch the animals in the wild; it can be dangerous for them and you.
If you want to learn more, you __________ join the free guided tour at 10:00 AM. It’s not mandatory, but it’s very interesting!
should
You __________ pay for a ticket at the gate, or the guards won't let you enter.
have to
Correct mistake: We don't have to kill bees because they are very important for our food.
We shouldn't kill bees because they are very important for our food.
Governments __________ create more protected areas for endangered species. It's the right thing to do!
should
People __________ buy products made from ivory or rhino horns. It's wrong and often illegal.
shoudn't
You can take photos, but you __________ use a flash. The bright light scares the nocturnal animals.
shouldn't
Zoos __________ keep animals in small cages; they need space to move and feel natural.
shouldn't
Correct a mistake: Does he has to work at the animal rescue center every weekend?
Does he have to work at the animal rescue center every weekend?
Fortunately, you __________ be a scientist to help; anyone can volunteer for local nature groups.
don't have to