[单项选择]The methods are tried and true, we used them for years and they have always worked for us.（）
A. 这些方法的的确确地被试过，我们已经采用这些方法好几年了。
B. 这些方法经过实验，证明可靠，我们已使用这些方法多年了。
C. 这些方法试过，而且不太真实可信，虽然我们已经采用这些方法好几年了。
D. 这些方法我们只采用了一年，因此，我们不能证明这些方法是可靠和可信的。

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[单项选择]A. Because Americans used them very often in thel7th century.
B. Because England wanted to win the naval competition against the Netherlands.
C. Because British people used them for things that were not good to hear.
D. Because American people hated the Dutch people.

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[单项选择]A. Because Americans used them very often in the 17th century.
B. Because England wanted to win the naval competition against the Netherlands.
C. Because British people used them for things that were not good to hear.
D. Because American people hated the Dutch people.

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[填空题]We watch TV with them.

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[单项选择]

As long as we have been on earth, we have used the sea around us. We take from the ocean and we give (41) it.
We take fish from the ocean — millions of kilograms of fish, every year, to (42) millions of people. We even use (43) bones for fertilizer and meal.
We take (44) from the ocean. One way to get salt (45) sea water in a shallow basin and leave it (46) it evaporates. Along with salt, other minerals are left after evaporation — iodine (碘), magnesium(镁), and bromine(溴), to (47) a few.
Much gold and silver drift (48) in the waters of the sea, too. But the sea does not (49) them up by simple evaporation.
Other gifts from the sea are pearls, sponges(海绵), and seaweed. Pearls become jewelry. (50) sponges become cleaning aids. Seaweed becomes (51) of many kinds —
A. weeds
B. contents
C. gifts
D. aids

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