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) is clear what the effects of global warming will be. ( )TTTFF purpose of the first paragraph is to ___. the writer B. explain a changeC. introduce the topic D. raise a question2. The graphs are used to _____. points by providing evidence the change of temperature the content of carbon dioxide in the air the readersReading Comprehension IIChoices.Choices.3. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr. Janice Foster. B. Charles Keeling.C. Gee Hambley. D. Sophie Armstrong.B〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓Reading IV (3m)4. But there are some very different attitudes among scientists towards this issue.“ Issue here means the same as the one in________.A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign.C. The government is expected to issue a statement about the election.D. The magazine has 12 issues each year.B〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓