单项选择题

What are they talking about

[A] They are talking about building a house.
B. They are talking about their modem house.
C. They are talking about making things.
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单项选择题
What’s Mr. Hun doing
[A] He’s speaking to someone else on the telephone.
B. He’s answering someone’s questions.
C. He’s working in his lab.
单项选择题
A． on B． out C． from
A． on
B． out
C． from
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