a person who watches somebody/something: o____
observer
___ an attempt to do st
in
____ average
on
a prize such as money, etc. for something that somebody has done
award
a thing that you are given because you have done something good, worked hard, etc.. A ____ for st
reward
made or produced to copy something natural; not real
artificial
to come to/reach the _____ that
conclusion
to do/perform/ carry out an ______ on st
experiment
as a matter of ___; face the ___: sự thật
fact
