HE COULDN"T COME TO THE CONFERENCE BECAUSE HE WAS SERIOUSLY IL...

88.He couldn"t come to the conference because he was seriously ill.

A. Because of his serious illness, he couldn"t come to the conference.

B. Although he was ill, he came to the conference.

C. His illness was very serious that he couldn"t come to the conference.

D. He couldn"t come to the conference, so he became seriously ill.