单项选择题

Do you have any ______ about what living beings on other planets would be like

A．ideal
B．comprehension
C．notion
D．intelligence

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单项选择题

During their first teacher training year, the students often visited schools for the ______ of lessons.

A．observation
B．investigation
C．inspection
D．examination

单项选择题

Belgium replied that she had always been faithful to her international ______.

A．obligations
B．duties
C．responsibilities
D．liabilities

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