24.（ ）

(单选题)As for University of Iowa, ______. (单选题)Based on Paragraph 2, we can know that ______. (单选题)Numbers of foreign students in America drop because of _____ (单选题)In the last paragraph, why does the author say “Americans do (单选题)For experienced cooks, ______. (单选题)About Americans’ recipes, which of the following statements (单选题)When the author talks about Americans’ cooking skills, which (单选题)According to Paragraph 2, which of the following statements (单选题)70.（ ） (单选题)69.（ ）