赞题库-背景图
单项选择题

Questions 1 to 5 are based on the following conversation.

A．10%-15%.
B．15%-20%.
C．25%-40%.
D．40%-55%.
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单项选择题A．Alan joined his father s firm.B．Alan s father has never been supportive of his career as a sculptor.C．His father originally thought art was just for amateurs instead of professionals.D．Alan quarreled with his father about his profession.

A．Alan joined his father"s firm.
B．Alan"s father has never been supportive of his career as a sculptor.
C．His father originally thought art was just for amateurs instead of professionals.
D．Alan quarreled with his father about his profession.

单项选择题What is the most important scientific progress in the 20th(上标) century

A．People"s new knowledge of themselves.
B．The development of computer technology.
C．The birth and growth of the Internet.
D．Mankind"s ability to control global warming