---Where did you find the package?

---It was on the beach_________we were taking a walk．

A．where

B．that

C．when

D．which

有人把产能过剩比喻为“悬在行业头顶上的堰塞湖”，这既表达了对过剩问题的担心，也说明治理过剩已______。 填入横线部分最恰当的一项是( )。

A．生死攸关

B．迫在眉睫

C．尘埃落定

D．水到渠成