单项选择题

Send $ 30 for catalog. Refundable against purchase.

A. $30 will be returned if you buy the product.
B. Customers should pay $ 30 for the catalog.
C. The money can not be taken back.
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If any problem occurs, contact your nearest Sorry dealer. Whenever something goes wrong, ______.
A. call the local maintenance engineer
B. contact the seller closest to you
C. repair it yourself
单项选择题
Meeting Hall Multi-language instant translation system, 4th floor
A. Translation is done at the same time.
B. Speeches will be translated later.
C. You will get translated version right away.
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