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.
Daylight Saving Time begin at 2 a. m. ______ in the United States every year.

A．on the last Sunday of April
B．on the first Sunday of April
C．on the last Sunday of May
D．on the first Sunday of May

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单项选择题

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. Daylight Saving Time begin at 2 a. m. ______ in the United States every year. 您的浏览器不支持 audio 元素。