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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单项选择题
A．Collecting information about the bacteria.B．Working on a cattle ranch.C．Writing a paper about extinct animals.D．Analyzing buffalo behavior.
A．Collecting information about the bacteria.
B．Working on a cattle ranch.
C．Writing a paper about extinct animals.
D．Analyzing buffalo behavior.
单项选择题
A．They found ways to speed up the reproduction of bald eagles.B．They developed new types of feed for baby bald eagles.C．They explored new ways to hatch baby bald eagles.D．They brought in bald eagles from Canada.
A．They found ways to speed up the reproduction of bald eagles.
B．They developed new types of feed for baby bald eagles.
C．They explored new ways to hatch baby bald eagles.
D．They brought in bald eagles from Canada.
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