______black—headed gulls(红嘴鸥) come to Kunming to spend their winter every year.
A.Thousands | B.Thousands of |
C.Thousand of | D.Thousand |
______black—headed gulls(红嘴鸥) come to Kunming to spend their winter every year.
A.Thousands | B.Thousands of |
C.Thousand of | D.Thousand |