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20 questions
b
p
f
b
p
m
f
n
m
m
f
b
d
t
l
g
n
t
m
n
k
l
g
n
h
g
d
c
t
k
e
a
u
o
u
a
a
u
e
i
e
ü
e
ü
u
ü
e
u
What is this tone?
ā (1)
á (2)
ǎ (3)
à (4)
What is this tone?
ō (1)
ó (2)
ǒ (3)
ò (4)
What is this tone?
ū (1)
ú (2)
ǔ (3)
ù (4)
What is this tone?
ī (1)
í (2)
ǐ (3)
ì (4)