第103页 - 亮点给力提优课时作业本七年级英语译林版

is

mostly

full

of

hundreds

of

thousands

of

living

things

 They lie across parts of Canada, China, Finland, Japan, Norway, Russia, Sweden and the USA.

 Because they are home to many kinds of animals and help take in harmful gases.

 Cutting down trees./Human activities.

 Hopeful.

 To call on people to protect snow forests.