第一节：对话填空（共10分）
M：Hello，67891234.
W：Hello，is that Xiao Qiang （76）s______? This is your sister Xiao Lan speaking.
76 s__________
M: Hey, how are you? Are you coming back this weekend ? We all (77)m____ you. 77m_________
W: Of course. Mum is going to (78)c______ her 50th birthday this Saturday. 78c________
