．—How did you pay the workers?—As a rule,they were paid ________.A．by hour B．by the hour C

请背出来：
pay sb.by the hour 按小时支付 by the week 按周 by the month 按月
sell sth by weight 按重量出售（没有the）
take /hold / catch sb.by the 身体某一部位
hit sb.in the face ,但：hit sb on the cheek
hit sb.on the 身体某一部位
buy sth.by the dozen 按打地