When is Labor Day in U.S.A.?A.The first Monday of May.B.The first Monday of September.C.Th
When is Labor Day in U.S.A.?
A.The first Monday of May.
B.The first Monday of September.
C.The last Monday of May.
D.The last Monday of September.
请帮忙给出正确答案和分析,谢谢!