一What does the sign over there read?一“No person ______ smoke or carry a lighted cigarette, cigar or pipe in this area.”
Was it because he was ill ____ he asked for leave?
It was on October 1st ____ new China was founded.
It was in the rice fields ____ we had our league meeting.
It was through Xiao Li ____ I got to know Xiao Wang.
He was unable to make such progress, ____.