单项选择题


When did her teacher come to Helen Keller

[A] When Helen was 7.
B. When Helen was 17.
C. Immediately after Helen lost her sight and hearing.
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单项选择题
This passage mainly focuses on ______.
A．life history on Earth
B．animals and plants in the world
C．disappearances of animals and plants in Australia
D．discoveries of new animals and plants in Australia
单项选择题
The two scientists were quarrelling at the beginning of the story, because ______.
A．the Japanese watch was better
B．the German watch was better
C．each of them thought his own watch was better than the other’s
D．both the watches were wrong
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