单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．Providing aid to the disabled
B．Selling products made for left-handers.
C．Promoting products for manufacturers
D． Printing labels for manufactured goods.
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单项选择题
A．They are looked after by animal-care organizations.B．They sacrifice their lives for the benefit of humans.C．They look spotlessly clean throughout their lives.D．They are labeled pet animals by the researchers.
A．They are looked after by animal-care organizations.
B．They sacrifice their lives for the benefit of humans.
C．They look spotlessly clean throughout their lives.
D．They are labeled pet animals by the researchers.
单项选择题
Google claims its plan for the world’s biggest online library is______.
A．to save out-of-print books in libraries
B．to encourage reading around the world
C．to promote its core business of searching
D．to serve the interest of the general public
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