第83页 - 通城学典课时作业本八年级英语译林版南通专版

Canada geese spend spring and summer in Alaska and northern Canada.

Because it is warmer there now than it was in the past.

They usually fly in groups of about 100, but groups of 1,000 are common too.

They will fly lower on cloudy days.

I think they are smart.(言之有理即可)

Teachers often advise us to read more books to change the future.