部门预算中的项目支出预算所使用的编制方法，实质是( )。

A．零基预算

B．绩效预算

C．基数预算

D．平衡预算

London employers were __________ a shortage of school-leavers, while many graduates were looking for better work opportunities.

A．adding up

B．turning to

C．digging out

D．suffering from