问题
选择题
Many kinds of birds fly south at the ______ of winter.
A．sight
B．approach
C．direction
D．access
答案
答案：B
at the approach of winter “在冬天来临时”。
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Many kinds of birds fly south at the ______ of winter.
A．sight
B．approach
C．direction
D．access
答案：B
at the approach of winter “在冬天来临时”。