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(单选题)Tianjin is one of ______ cities in China. (单选题)John worked hard at his lessons and gained admission ______ (单选题)I was told that the singer ______ in 1980. (单选题)Don’t worry. I’ll help to ______ the guests. (单选题)From the text we can see that the writer seems ______. (单选题)We can draw a conclusion from the text that ______. (单选题)The estimates in Economic Outlook show that in rich countrie (单选题)It can be inferred from the text that the retail price of pe (单选题)The main reason for the latest rise of oil price is ______. (单选题)The author uses the example of a monkey to argue that robots