下面的四组字母中不含有相同的元音音素的是(   )
#17231
A
b, t, c
B
s, l, n
C
q, u, w
D
a, k, f
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________表示“联合国” 
#17227
A
UN
B
RMB
C
CCTV
D
UK
--Is Guo Peng your brother?-- __________
#17210
A
Yes,it is
B
Yes,he is
C
No,it isn’t
D
No,he is
Which of the following underlined parts is different in pronunciation from the others?
#16755
A
Please focus your attention on your papers, boys and girls.
B
She likes to show off her new clothes in front of her friends.
C
I think she should improve her learning methods.
D
The boy picked a hole in his new sweater.