tourism developing more and more people prefer to go travelling for a holiday.A. As.B. W

问题补充：

tourism developing, more and more people prefer to go travelling for a holiday.

A. As.

B. With

C. Upon

D. For

答案：

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。