---Hello Mary. This is Joe.---.---Nice to meet you too.A. How are youB. Nice to meet you

问题补充：

---Hello, Mary. This is Joe.

---.

---Nice to meet you, too.

A. How are you

B. Nice to meet you，too

C. Hello

D. Nice to meet you

答案：

A. How are you

B. Nice to meet you，too

C. Hello

(答案→)D. Nice to meet you

解析：在英语中，初次认识某人可以说见到你真高兴，Nice to meet you 表示此意，故本题选D。