单项选择题

A．Because the time of a period is too long.
B．Because they are lacking in sleep.
C．Because they are not interested in the class.
D．Because they want to go out and play.
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单项选择题
A．Peaceful. B．Gloomy. C．Tiring. D．Exhausting.
A．Peaceful.
B．Gloomy.
C．Tiring.
D．Exhausting.
单项选择题
A．A gathering of suggestions and information. B．A book full of useful knowledge. C．A fact concerning wildlife. D．A book about farmers in southern Africa.
A．A gathering of suggestions and information.
B．A book full of useful knowledge.
C．A fact concerning wildlife.
D．A book about farmers in southern Africa.
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