—I didn’t take notes at yesterday’s meeting because I had left my pen at home.

—You ________ mine. I ______ it.

A．must have borrowed; wasn’t using

B．may have borrowed; wasn’t using

C．should have borrowed; hadn’t used

D．could have borrowed; wasn’t using

属尘肺的一级预防（）。

A、定期体检，早期发现矽肺患者

B、通风除尘、湿式作业

C、防止矽肺恶化

D、预防并发症

E、促进康复