1.
Read and choose.
Helen is reading some words in the classroom.读一读，选出每组单词中画线部分发音不同的一项。
(1)
A.
cut
B.
cute
C.
excuse
(2)
A.
up
B.
computer
C.
bus
(3)
A.
study
B.
mule
C.
duck
(4)
A.
juice
B.
ruler
C.
tube
(5)
A.
sugar
B.
mum
C.
fun
【考点】
音标;
