It is Tim, my best friend in my childhood, who tells me he always dreams of ______ for him to go to Shanghai to study and live there.

A．there to be a chance

B．there is a chance

C．there being a chance

D．being a chance

数据库是指按照一定的规则存储在计算机中的 【4】 的集合，它能被各种用户共享。