根据每组对话上下闻的意思，填上适当的词，使句子完整。（每空只填一词）
A：_______ is your father _______?
B：He is _______ in the study.
A：_____ I speak to your dad, please?
B：He is ________ dinner. Please hold on.
A：______ you want to ____ to Children’s Center?
B：Sure.
A：______ that?
B：Uncle Larry.
A：What are you ______?
B：I’m sending Grandpa ____ e-card.