1 . She gave a speech on how to get along with peers ________ ________ ________(代表) her school. (根据汉语提示完成句子）

2 . He spoke_________ _________ _________(代表) all the members of the faculty and staff. （根据汉语提示完成句子）

3 . —How do the shops make money if they sell at such low prices?
—Manufacturers, it seems, are willing to bring down prices _______ big volume purchases.

A．under the name of	B．on behalf of
C．in return for	D．in preparation for