3. He played on the _____ for two hours and when he returned he found half his goods _____ stolen.

A．sand; were

B．sand; was

C．sands; were

D．sands; was

露剂系指含挥发性成分的药材用水蒸气蒸馏法制成的芳香水剂，适用于芳香药物的制剂，供外用。