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

Sales were good but distribution problems led to a slight drop in profits. The company had problems with()

A. producing enough goods.
B. delivering enough goods.
C. selling enough goods.