27.（ ）

(单选题)Why did the art dealer admit that he had forged paintings? (单选题)What do we learn about the Southern Ocean? (单选题)What happens when sea levels rise in the Antarctic? (单选题)What does the passage say about king penguins? (单选题)What do we learn from the findings of a separate study? (单选题)What will happen by 2100, according to a new study? (单选题)（ ） (单选题)It can be known from the text that ______ can be responsible (单选题)According to the Paragraph 4, which way may not be used to p (单选题)The underlined word toxic can be replaced by ______.