单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Write comments on the others’ works.
B．Give advice to each other.
C．Write poems.
D．Publish new works.
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单项选择题
According to Paragraph 1, we can learn that ______.
A．scientists have made certain achievements in HIV vaccine
B．HIV vaccine has been proved successful ultimately
C．HIV vaccine has been proved useless
D．HIV has already been decoded and defeated
问答题
电视节目中广告很多 2．广告的利与弊 3．我的观点On Television Advertisement __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________
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