下列有关抗体的叙述中不正确的是（ ）
More historical buildings in the old town will fall down________we try our best to protect them.
“中华开国五千年，神州轩辕自古传。创造指南车，平定蚩尤乱。世界文明，唯有我先。”阅读材料回答：
—Do you often exercise to keep strong?
—Yes, I do.
