Why does Johnny look unhappy?A.He doesn"t like Jenny.B.He doesn"t know what is body langua

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Why does Johnny look unhappy?

A.He doesn"t like Jenny.

B.He doesn"t know what is body language.

C.The customers prefer Jenny to him.

D.The customers often go to him instead of Jenny.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗