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Usually, snakes can swallow mice whole. But in winter, things may be reversed. In a zoo in Nanjing, some white mice, which were supposed to be the snake's food, started to gnaw on the snake. The zookeeper put some mice into the snake's enclosure but the snake was in hibernation, and needed hardly any food. The mice, on the other hand, were hungry and turned on their erstwhile predator.

Why were the mice able to eat the snake?

A. The snake was ill

B. The mice were too strong

C. The snake was in hibernation

答案：C

（中國日報網英語點津 編輯：Julie）