单项选择题

Questions 21 and 22 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
The strike is to protest against

A．social and economic policies.
B．transportation problems.
C．school safety issues.
D．regional election.

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单项选择题

单项选择题

Questions 21 and 22 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. The strike is to protest against 您的浏览器不支持 audio 元素。