The pany has a free long-distance telephone number customers may call with any questions they have about the products .
A. when
B. so that
C. while
D. as
网友回答
A. when
(答案→)B. so that
C. while
D. as
解析:本题考查连词。When当……时, so that以便于,while然而, as由于,如同。
句意:这家公司有一个免费的长途电话号码,便于顾客们拨打询问有关产品的问题。so that引导目的状语从句,选B。