This kind of material expands（）the temperature increasing.

A.who
B.whom
C.whose  
D.what

A.How do you do
B.How are you
C.Fine, thank you
D.Hi, how are you getting on

A.Oh, I have never seen you. 
B.Yes, I am glad.
C.Hello, John. Nice to meet you.
D.How are you?