第97页 - 亮点给力提优课时作业本八年级英语译林版

 Over 2,000 miles.

 To find better places with less snow and more food.

 Its body temperature drops, and its heart beats more slowly.

 They are usually brown in summer, and white in winter.

 I will go outside to have fun. Because I can 

not only exercise outside, but also make a 

lot of new friends.