________ time went by, small clever animals covered the earth and have become the most important animals on the planet.
#31981
A
With
B
As
C
Because
D
During
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_____there are many different types of food, some animals spend their lives eating only one type.
#30402
A
Since
B
As
C
Despite
D
While
—Did you return Fred’s call? —I didn’t need to ____ I’ll see him tomorrow.
#79824
A
though
B
unless
C
when
D
Because