Another 1,000 workers were  dismissed  when the machinery plant was in difficulties.

A. taken off

B. driven off

C. put off

D. laid off

【答案解析】本题正确选项D。【译文】当机械厂陷入困境时，又有1000名工人遭到解雇。【解析】在四个备先项中，take off“起飞”；drive off“赶走”；put off“推迟”；lay off“解雇”；题中划线词dismiss意为“解雇”。因此，依据题意在选项中最符合题意的选项是D。