What are the workers talking about ?They are discussing the idea the old worker a

问题补充：

--- What are the workers talking about ?

--- They are discussing the idea the old worker at the meeting yesterday.

A. put forward

B. came up

C. set off

D. brought out

答案：

(答案→)A. put forward

B. came up

C. set off

D. brought out

解析：考查词组：A. put forward提出（及物），B. came up想出，提出（不及物）， C. set off出发，引发D. brought out显现，句意：--这些工人在谈什么？--他们在讨论老工人昨天开会提出的想法。选A。