Though suffering constant noise from the outside world, little Tommy was still working with all his

attention _____ on his unfinished warship model.

A．focusing

B．concentrating

C．fixed

D．looking

企业发放职工工资，应( )。

A．借记“现金”

B．贷记“现金”

C．借记“银行存款”

D．贷记“应付工资”