—He       to the meeting. Have you informed him of it?

—Sorry. I       to.

A．hasn’t come; am going

B．didn’t come; have forgotten

C．hasn’t come; forgot

D．doesn’t come; will have

民用航空产品是指（）.

A.民用航空器

B.航空发动机

C.螺旋桨

D.以上都对