Nowadays it is difficult for people to find ______ work in the world because ______ economic

situation is very serious.[ ]

A. /; an

B. /; the

C. the; the

D. a ; /

在工作面撬浮顶必须使用（）。

A、手镐

B、打眼钎子

C、长撬棍

D、小钢轨