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This is a family of pigs.
This is a family of dogs.
This is a family of ducks.
字母U在重读开音节中，在 d,t,n,l,r,j后面读[u:]
He jumps over the tube.
He jumps over the flute.
He jumps over the cute mule.
He jump over the ice cubes.
He jumps over the_________.
run
bus
huge
flume
duke
mule
bug
duck
flute
fun
glue