问题
选择题
—What____your friends doing?
—They are____.
[ ]A. is; dancing
B. are; dancing
C. is; danceing
D. are; danceing
答案
答案：B
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—What____your friends doing?
—They are____.
[ ]A. is; dancing
B. are; dancing
C. is; danceing
D. are; danceing
答案：B