Some animals cannot survive from autumn ___ spring because of the cold weather.
They hibernate (which means they sleep through the winter) as a way of keeping themselves alive ___ the spring.
Another reason for hibernation is that it is hard to find food ___ the winter.
___ the time winter comes, they need to have enough body fat to keep them alive while the hibernate.
___ autumn, hibernating animals collect food for storage, and eat more food than usual.
If there is a shortage of food at that time, the animals might not live ___ spring when it can find its food again.
___ the end of hibernation, the animals live off their body fat.
Вставьте предлоги:to,during,until,from,by.

Some animals cannot survive from autumn until spring because of the cold weather. They hibernate (which means they sleep through the winter) as a way of keeping themselves alive until the spring. Explanation: The preposition "until" is used to indicate the duration of time that the animals are hibernating, which is from autumn to spring. Another reason for hibernation is that it is hard to find food during the winter. Explanation: The preposition "during" is used to indicate the time period in which it is difficult to find food – the winter. By the time winter comes, they need to have enough body fat to keep them alive while they hibernate. Explanation: The preposition "by" is used to indicate the point in time at which the animals need to have enough body fat – the time when winter comes. From autumn, hibernating animals collect food for storage, and eat more food than usual. Explanation: The preposition "from" is used to indicate the starting point in time – autumn, when the hibernating animals begin collecting food. If there is a shortage of food at that time, the animals might not live until spring when it can find its food again. Explanation: The preposition "until" is used to indicate the point in time when the animals might not live – spring, when they can find their food again. By the end of hibernation, the animals live off their body fat. Explanation: The preposition "by" is used to indicate the point in time when the animals start living off their body fat – the end of hibernation.