缺詞填空
1.Venus(金星）is our nearest neighbour in s_____.It's only 42 million kilometers away.We know that in some ways:Venus in l_______ the earth.Venus goes round the sun.It's a _______ as big as the earth,too.In o_______ ways,the two planets are very different.Venus lies under very thick clouds of dust.The clouds hold the s________ heat under them.In some places,the t_______ goes up to 280 centigrade.
Earth people can't live w_________ air,but our neighbour planet does have this k_______ of air.There is very l_______ weather on Venus.Still,some scientists believe microbes(微生物)may be a_______ to live on Venus.They are not s_______ about this e________ one thing:earth people cannot live on Venus.
2.Sheep usually live to be about eight years old.They don't like to be a________.That's why they live in groups.Sheep are very gentle animals.People who raise and care for sheep are c______ shepherds(牧羊人).Sometimes,shepheards have d________ to help take care of the sheep.The dog learns to round up the sheep.When one cannot find the way home,the dog b_______ it back!
When a l_________ is born,the shepherd makes sure it gets off to a good start in life.The sheep has been a friend to people for over 10000 years.Sheep give people both m________ and clothing.There are many kinds of sheep.
Some people raise sheep for meat,and others for their w________.Sheep eat grass.Sheep usually give b________ once a year and have one to three baby sheep.Baby sheep go to market when they are between 90 and 120 pounds.Wool p_______ people from cold and wet weather.Even if your wool sweater gets w_______ from snow of rain,it will still keep you warm.