单项选择题
A．Overall, sales are up last year. B．Overall, sales are down last year. C．There is no change compared to previous sales. D．It is not mentioned in the passage.
A．Open the gift immediately in front of the giver. B．Wrap the gift carefully. C．Express the appreciation for the gift you receive. D．Buying a present card to avoid the trouble in shopping.
A．respond to the owners" order B．respond to a sound device C．act on the owners" instructions D．act on the trainers" order