单项选择题

Questions 14 to 16 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage. When did home-schooling begin in the U.S.

A．In 1852.
B．In the middle of the nineteenth century.
C．At the time the District of Columbia established.
D．At the time the country establishe
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单项选择题
What was Clarence Birdseye surprised to learn
A．A fish could survive being frozen.
B．The fish were easier to catch in the winter.
C．Food can be kept frozen indefinitely.
D．Solutions that freeze slowly form large ice crystals.
单项选择题
Which point about Adsense was NOT addressed in the passage
A．You can tailor the look and feel of the ads to suit your needs.
B．You are paid based on the number of times people click on the ads.
C．You can see how your account is doing by viewing statistics online.
D．You needn’t deal with advertisers since Google helps you do that.
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