单选题：It can be inferred from Paragraph 2 that before the visa reg

题目分类：理工类
题目类型：单选题
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题目内容：

It can be inferred from Paragraph 2 that before the visa regulations were revised foreign teachers didn't have to________. A．sign new contracts if they wanted to continue to work.
B．go through any formalities if they wanted to stay a bit longer.
C．visit a neighboring country if they wanted to renew their visas.
D．interview a South Korean official if they wanted to apply for work permits.

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分类：理工类题型：单选题

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分类：理工类题型：单选题