单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．Repeated measurements of the sizes of ants.
B．Systematic observations of ants and nests.
C．Simulated experiments on ants behavior.
D．Gathering sample nests and ants.
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单项选择题
A．Thursday.B．The day after tomorrow.C．Saturday.D．Six months later.
A．Thursday.
B．The day after tomorrow.
C．Saturday.
D．Six months later.
单项选择题
A．They were caused by the dirty smoke from burning coal.B．They were so thick that you could only see your own hand in front of you.C．They are still characteristic of London as London Particulars .D．They are the symbol of the mystery of London.
A．They were caused by the dirty smoke from burning coal.
B．They were so thick that you could only see your own hand in front of you.
C．They are still characteristic of London as "London Particulars".
D．They are the symbol of the mystery of London.
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