单项选择题

Press a third button so that the alarm is set.

A. To set the alarm, you need to press the button three times.
B. There are three buttons needed to set the alarm.
C. After pressing a third button, you finish setting the alarm.

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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.

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.