--I called you yesterday evening, but there was no answer.

--Oh, I’m sorry I __________in the shopping mall.

A．shop

B．shopped

C．was shopping

D．have shopped

岩屑录井中油气显示发现率的计算公式是：油气显示发现率＝手剖面油气显示发现指数/综合图落实的油气显示层数100％。