单项选择题

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。

A.He knows her from their elementary school science class.
B.She knows him from computer science class.
C.They went to the same high school.
D.She is his sister.
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单项选择题
The reason some children are backward in speaking today is that ______.
A.they do not listen carefully to their mothers
B.their mothers are not intelligent enough to help them
C.their brains have to absorb too much language at once
D.their mothers do not respond to their attempts to speak
单项选择题
What can we infer from the tragic example given in the first paragraph
A.People rescued the man before he was drowned in the polluted water.
B.Some people were near the man who was drowning but they did not try to rescue him.
C.The man could have been saved if the Thames had not been so seriously polluted.
D.The rescuers could not see the drowned man because he was carried away by the fast flowing river water.
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