Completa las siguientes cuestiones:
a) and
b) but 
c) or
d) as
Correct!
a) and 
b) but
c) or
d) both
Correct!
a) and
b) but 
c) or
d) as
Correct!
a) and
b) but
c) or 
d) both
Correct!
a) as
b) until
c) for
d) since 
Correct!
a) After 
b) Since
c) However
d) Until
Correct!
a) therefore
b) however 
c) so
d) since
Correct!
a) both, and
b) either, or
c) as, as 
d) whether, or
Correct!
a) because 
b) for
c) and
d) although
Correct!
a) because
b) although
c) so that 
d) if
Correct!