9. Everybody______ in the hall where they were welcomed by the secretary.
A. assemble B. accumulated C. piled D. joined
accumulate 積累
gather 收集(到一起)，收割(莊稼)
collect 收集(帶有某種目的的收集)
pile 堆到一起
compile 匯編，編輯
pilgrim 圣徒，朝圣者
analog 類比，類似物
analogy 類推
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