第13题: [单项选择]What does the passage mainly discuss A. A comparison of two popular comic strips. B. The differences between early and modem comic strips. C. The effects of newspapers on comic strip stories. D. Features of early comic strips in the United States. 参考答案:D 答案解析:主旨题。回答此题,需要通读全文,在理解全文的基础上我们看一下四个选项,不难发现选项D)是正确答案。