单项选择题

Questions 18 to 20 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. Which of the following is TRUE according to the passage

A．Time reverts back to standard time on the first Sunday of October.
B．The United States has used Daylight Saving Time since 1918.
C．The Uniform Time Act requires Daylight Saving Time be observed by all states.
D．Daylight Saving Time was first used in European countries at the beginning of World War I.

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单项选择题

What do you think is the best title for this passage

A．How Is Diamond Formed And Found.
B．Diamond--A Precious Stone.
C．Diamond Hunting.
D．Diamond-Producing Countries.

单项选择题

From the passage, we can infer that the first wood pulp mill in Canada ______.

A．turned out high-quality paper
B．used wood imported from the United States
C．caused a serious environmental problem
D．was a ready market for its product

Questions 18 to 20 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. Which of the following is TRUE according to the passage 您的浏览器不支持 audio 元素。

Questions 18 to 20 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. Which of the following is TRUE according to the passage