I always wanted to do the job which I’d been trained .A. onB. forC. byD. of

问题补充：

I always wanted to do the job which I’d been trained .

A. on

B. for

C. by

D. of

答案：

A. on

(答案→)B. for

C. by

D. of

解析：

考查介词。句意为：我经常想做我之前为之受过培训的工作。for表示目的，意为“为了……”，符合题意。