一点点英语问题1.Tom _____it if he doesn't want to.a.doesn't need do

一点点英语问题
1.Tom _____it if he doesn't want to.
a.doesn't need do b.need not to do
c.needs not to do d.need not do
(为什么选D呢?不是need to do sth )
2.Life in the future will be different from life today.
There will be many poeple in the world and most of them
may live longer.Computers will be even smaller.People
will have more time for sports and travlling.More people
will go to other countries for holidays.More land will be
used for building houses.Then there will be less room for
cows and sheep,so meat will be more expensive.Maybe no
one will eat it every day.Instead thay willrat fruit and
vegetables.Maybe people will be healthier.
In the future,dangerous work will be done by robots.So many
people will not have _____work to do.
好辛苦锕,为了最后一个空...把整段文都抄下来,
请问为什么最后一个空不是any 而是 enough ...不解,)
3.They haven't decided where to build the new hospital.(改为同义句(
They haven't decided where they should build the new hospital.
这样改可以吗?:把 should 改成 could
4.Well,I think you'd better _ring_(把它改成phone可以吗?)him back
right now.(right now 是什么意意思?)
He thought it _might__(把它改成would可以吗,may呢?) be wonderful.
5.I like travelling so much __that___I often meet different people and visit different places.(that 在这里的作用是?)

1 need to do sth这裏need作为行为动词（因为两个动词间才有to do）,所以主语是tom的话时态语态肯定都不对,所以考虑need做情态动词,于是直接加not加动词
2 dangerous吧,有个so,跟上文有联系,看到dangerous work会被机器人做暸……
3 可以
用could句意有改动,理解为“可以在哪里”而非“应该在哪里”,“要在哪里”
4 可以,作动词解释为给……打电话,用call也可以
现在
may的话时态不对了,要根据thought改动才用了might
would 可以,但是句意跟原来的幷不完全一样 比原句的语气更肯定些
5 so...that... 如此.以致于.的结构