A．They used them as textbooks to teach spelling and calculating.
B．They told the students the history .of catalogs in class.
C．They made their purchase as the farmers did.
D．They got new information from them.
A．They made some small stores lose confidence.
B．They forced some small stores to lower the price.
C．They promoted the sales in some small stores.
D．They drove some small stores out of business.
A．Because he wants to say goodbye before going abroad.
B．Because he is tired of taking care of his pet by himself.
C．Because he wants to find someone to adopt his pet.
D．Because he wants to consult about the caring service for his pet.