tourism developing, more and more people prefer to go travelling for a holiday.
A. As.
B. With
C. Upon
D. For
网友回答
A. As.
(答案→)B. With
C. Upon
D. For
解析：考查介词。as是连接词，后面要加句子。而with是介词，后面加名词短语意思是随着。Upon 在……之上；For为了表示原因。tourism developing,是短语，故选B，随着旅游业的发展。