They used a lot of and cheaper.They can do 4 difficult w

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They used a lot of and cheaper.They can do __4__ difficult work.
They used a lot of energy(能量).Only __2__ people were interested __3__ them.Today computers are smaller and cheaper.They can do __4__ difficult work.
Computers become important __5__ many reasons(原因).They work faster than man and make few mistakes.They can "remember" much information.A computer can do millions of problems __6__ a few seconds.A person might __7__ years to work out so many problems.
People now use computers in nearly every kind of work.Computers are very useful and the use of computers __8__ growing.More computers mean more jobs for people,
2.A.few B.little C.a few D.a little
3.A.in B.with C.on D.by
4.A.and B.so C.but D.or
5.A.in B.by C.for D.on
6.A.with B.on C.at D.in
7.A.need B.get C.want D.make
8.A.are B.is C.has D.have
这几个题我全错了嘿嘿.答案是CABCDAB.但是我不知道为什么会填呀.能不能给我详细的说一下呢?

2.few / a few用来修饰可数名词,few表示否定意义,没有,几乎没有；
a few表示有肯定意思,有几个,少数.little / a little用来修饰不可数名词,little表示否定意思,没有,几乎没有.a little 表示肯定意思,有一点儿.句中意思是只有少数人.people可数,用a few.
3.be interested in 对...有兴趣,固定搭配.
4.and：和,so：多么,这么,but：但是,or：或者,联系句中意思,它们可以完成多么难的工作.
5.只有for有因为的意思,for...reason,因为...原因,固定搭配.
6.小时,分,秒都搭配介词in.
7.need：需要,get：得到,want：想要,make：做,制定,使得,获得,成为,联系句中意思,需要几年去算出这么多问题.
8.主语是the use of computers,计算机的使用,不可数,用is.

They used a lot of and cheaper.They can do __4__ difficult w today computers are small and cheaper.---they can do a lot o things,lot,a,of,do,can,they(连词成句) They used a scientific ( B ) to do a lot of researches on th they can do a lot of things.变成否定句,和一般疑问句急!求助They can do a lot of work for people.划线部分提问 AND SALESMEN HAVE TO DO A LOT OF GLAD HANDING IF THEY WANT T They often do a lot of exercise in the g___ they had a diver and they had a car ,and a lot of s( ). they s_______ a lot of time and money on it Do they have a lot of milk 的肯定回答是YES they do吗 They have a lot of and they also have .A.practice,funs B.pra