中国银行系统从事的外汇转贷业务，如上级行借入外汇资金后转给下级行贷给国内用户的，在下级行，以其向借款方收取的全部利息收入减去支付给境外的借款利息支出后的余额为营业额。 ( )

Of course, there have been times, as a young man, when I got tired from study and devoted my time to playing.()

A. tired of

B. got tired of

C. tired up

D. used to tire of