23. Everybody _____ in the hall where they welcomed by the secretary.

A. assembled B. piled C. joined D. accumulated

assemble (人群)聚集

assembly line 装配线

semblance 外表

resemble 相似，相像

take after 与某人长得像

pile 堆积

compile=put together 编辑，汇编

accumulate 积累

cumulus 积雨云

cumulative 积累的，渐增的