— What did he _______ just now?— Sorry, I didn't catch his words. I_______ about something else.
A：speak; am thinking
B：talk; thought
C：say; was thinking
D：tell; have thought
科学家在天津市东部平原上发现了四道贝壳堤（海生动物贝壳及碎屑堆积的高地）且与现今海岸线基本平行．该现象说明了天津的（ ）
“红豆生南国，春来发几枝”描述的是哪种生命现象( )
