问题
选择题
There are more and more birds flying to Yancheng for winter every year, _____? [ ]
A. are there
B. aren't there
C. are they
D. aren't they
答案
答案：B
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There are more and more birds flying to Yancheng for winter every year, _____? [ ]
A. are there
B. aren't there
C. are they
D. aren't they
答案：B