单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．Business.
B．Computing.
C．Architecture.
D．He hasn’t decided yet.
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单项选择题
The longest ministerial conference in the history of WTO lasts for ______.
A．nine days
B．ten days
C．eighteen days
D．twenty days
单项选择题
A．Husband and wife.B．Friends.C．Workmates.D．Mother and son.
A．Husband and wife.
B．Friends.
C．Workmates.
D．Mother and son.
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