单项选择题

Question 28 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question. Now listen to the news.

A．Before the telescope was repaired.
B．After the rocket was exploded.
C．When the rocket was to be within less than a kilometer from the spacecraft.
D．When the experts could look deeper into space than ever before.
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单项选择题
In general, about_____ of complaints cannot be investigated.
A．10 per cent
B．20 per cent
C．25 per cent
D．30 per cent
单项选择题
What implication of the research is the speaker concerned about
A．Language acquisition may be negatively affected.
B．Babies used in experiments often develop emotional problems.
C．Parents may force their children to learn at too early an age.
D．Early coaching will interfere with creativity.
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