单选题 The department store guards were nearly______by the crowds of shoppers waiting for the sale to begin.
【正确答案】 D
【答案解析】解析：A项overflow“充满”；B项overthrow“推翻，打倒”，通常后接的宾语是政府或某人；C项overturn“推翻，破坏”，后接的宾语通常是革命；D项overwhelm“压倒”。