ГДЗ зошит граматика Англійська мова 8 клас Хейдерман Prepare

4. Fill in the gaps with the modals of probability must, might, could, can’t.

Helpful Bees
Bees are very important for our world. They (1) must collect nectar from flowers. Without bees, many plants (2) might not grow well because bees help them by moving pollen from one flower to another. A bee (3) might sting if it feels scared, but it (4) can’t sting if it feels safe. The future (5) could be worrying for bees because of pollution and pesticides. If we are not careful, the number of bees (6) could down, and we (7) might not have enough bees to help our plants. So, we (8) must protect bees to keep our environment healthy.