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They collected Moon rocks to take back to t

he Earth for further research.

Neil Armstrong was presented with the

Medal of Freedom.

He was the pride of the whole world.

laboratory

scientist

science

discovery

discover

unknown

known/famous

widely

wide

advantage

disadvantage

development

develop

the whole night

make a great difference in our life

during one's lifetime

admire sb. the most

graduate from college

solve the problem of hunger for many people

be considered(as).

have many advantages over others

with the invention of...

by hand

in ancient times

get married

be unknown to...

push for the use of X-ray machines

die of/from

happen to

be introduced into

at present

I am leaving for Shanghai tonight.

I was writing an email to Wendy at 7 p.m

yesterday.

Many modern inventions have made a great

difference in our life.

It was brave of him to go to a place that was

unknown to humans at that time.

That is why I admire him so much.

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