课文填空。请根据相关课文内容填写下面空格。

　　Planes will be very large so flying will be very cheap．Fuel will be expensive．Everyone will have a small car．

　　It will be hot all year so the winter will be very short．It will 　　1　　 warm at the North Pole so the seas will be very 　　2　　．The summer will be hot and the winter will be warm．But there will be bad weather in spring and autumn．There will be heavy 　　3　　 and strong winds．

　　Homes will be warm in winter and 　　4　　 in summer, so they'll be very comfortable．We'll use the sun to 　　5　　 our homes．No one will be cold and there'll be lots of hot water．

　　Computers will be very small 　　6　　 they'll be very light．People will do many things 　　7　　 the Internet．

　　　　8　　 will do the dull jobs on farms and 　　9　　 factories and offices, so no one will do 　　10　　 work．People will work three days a week．They'll have long holidays and lots of free time．

根据汉语完成句子

我们将使用太阳能来加热水。

We'll use the sun ________ ________ the water.

在下列各句的空白处填入一个最恰当的单词，使句子意思完整，语法正确。

1.  The two boys look very_______. Maybe they are twins.
2.  When my bike doesn't work, my father can______it.
3.  We will think up some_______to solve the problem.
4.  Could you please hand these books_______? We'll use them in class.
5.  I think Uncle Zhang can help_______up the watch.

We'll use ________ to heat our homes．

A.
the sun
B.
the moon
C.
the earth
D.
stars

We'll use ________ to heat our homes．

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