To let go and allow something to move freely
Humans are believed to ( ) using fire more than one million years ago.
a: starting
b: started
c: be started
d: have started
d: have started
Did Leeuwenhoek live for a long or short amount of time?
A long time
Where did Leeuwenhoek work before becoming a scientist?
A small cloth store
to throw away unnecessary things
dispose
I regret ( ) too many vegetables last Sunday.
A: being bought
B: having bought
C: to buy
D: to be bought
B: having bought
What tiny life forms did Leeuwenhoek makes lots of discoveries about?
microorganisms
True or False - Leeuwenhoek invented microscopes.
False - He improved them.
to give or supply something to several people or places
distribute
to make water, air, and soil dirty and harmful
pollute
having done something wrong such as breaking a law
guilty