Вопрос 28

The speaker has only one sister. Select the punctuation that presents her work in Nairobi as extra information.

My sister who works in Nairobi, will be visiting.
My sister, who works in Nairobi is visiting.
My sister who works in Nairobi is visiting.
My sister, who works in Nairobi, is visiting.Правильный ответ

Объяснение

Because the sister is already uniquely identified, the clause adds rather than restricts information and needs commas on both sides. Omitting the commas is the closest distractor because it would make the clause appear to select one sister from several.

Объяснение

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