辽宁省朝阳市双塔区2024-2025学年九年级上学期开学英语试题（图片版，无答案）

fly south to spend the winter in Mexico,California and Florida,where it's
warmer.They travel 50~65 km each day and they travel about 1,125 km.
Some fish migrate to breed(繁殖).Salmon(鲑鱼)can swim over20,000kmin
their life.They are born in rivers in Ireland,Scotland and other places in
northern Europe.The young fish swim down the river to the sea and into the
Atlantic Ocean.They live in the ocean until they are adults.Then they return to
the river where they were born.They lay their eggs in the river and then they
usually die.Salmon do this because their eggs are safer in the river.Other fish
can't eat them.
Arcticterns(北极燕鸥)travel the furthest when they migrate.They spend the
summer in the Arctic,but when winter comes they fly to the Antarctic because
it's summer there.The next year they fly back to the Arctic again.In one year
these small birds travel 36,000 km from one end of the Earth to the other and
back again.Nobody knows how they do it.
)5.According to the text,monarch butterflies in North America migrate
to
A.find insects
B.look for water
C.find better weather
D.produce the young
)6.Adult salmon swim back to the river because
A.they won't be eaten by other big fish
B.they want to lay eggs in a safer place
C.they are getting ready to die there
D.they want to go where they grew up