补全对话。

A: Come and meet my family.

B: OK.

A: This is my grandfather.

B:   1   

C: How do you do?

A: This is my sister Jane.

B: Hi, Jane!    2   

D: Hi, Dave! Nice to meet you.

水泥砂浆配合比在试配时材料用量可按《砂浆配合比设计规程》JGJ98-2010选用，再试配、调整。