Paul:
Is it crowded in Beijing?

北京拥挤吗?
Mary:
Yes, it’s really crowded.

是的,十分拥挤。
Paul:
Is it too crowded?

是太拥挤了吗?
Mary:
Yes, it’s so crowded; sometimes it’s difficult to get on the metro.

是的,有时挤的你都上不去地铁。