1.Venus(金星）is our nearest neighbour in s(pace).It's only 42 million kilometers away.We know that in some ways:Venus in l(ike) the earth.Venus goes round the sun.It's a(lmost) as big as the earth,too.In o(ther) ways,the two planets are very different.Venus lies under very thick clouds of dust.The clouds hold the s(un's) heat under them.In some places,the t(emperature) goes up to 280 centigrade.
Earth people can't live w(ithout) air,but our neighbour planet does have this k(ind) of air.There is very l(ittle) weather on Venus.Still,some scientists believe microbes(微生物)may be a(ble) to live on Venus.They are not s(sure) about this e(xcept) 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(lone).That's why they live in groups.Sheep are very gentle animals.People who raise and care for sheep are c(alled) shepherds(牧羊人).Sometimes,shepheards have d(ogs) 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(rings) it back!
When a l(amp) 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(utton) and clothing.There are many kinds of sheep.
Some people raise sheep for meat,and others for their w(ool).Sheep eat grass.Sheep usually give b(irth) 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(rotect) people from cold and wet weather.Even if your wool sweater gets w(et) from snow of rain,it will still keep you warm.