单项选择题

A．She had to go home.
B．She was too tired to continue.
C．She had to finish her schoolwork.
D．She was thirsty.
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问答题
You should spend no more than 20 minutes on this task.
单项选择题
A．He can’t sleep at night.B．He can’t find a quiet place to study.C．He can’t narrow down his research topic.D．He can’t find enough information for his research paper.
A．He can’t sleep at night.
B．He can’t find a quiet place to study.
C．He can’t narrow down his research topic.
D．He can’t find enough information for his research paper.
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