问题补充：
He a Party member last year.
A. joined
B. joined in
C. took part in
D. became
答案：
A. joined
B. joined in
C. took part in
(答案→)D. became
解析：考查同义词辨析，joined普通用词，指加入党派、团体或游戏活动等；took part in侧重参加某项集体性、群众性事业、工作或活动，突出参加者在其中发挥一定的作用；joined in指参加活动；became表示成为，句子意思“去年他成为一名党员”
