As is known to us all, taking exercise is b____ to our health.

我国是一个统一的多民族国家，其中少数民族有（     ）

A: Excuse me. Is there a ____ near here?

B: Yes, there is.

A: Where is it?

B: It's ____the science museum.

A: Is it____

B: No, it isn't. Go straight to the first crossing and then turn ____

A: OK. I'll ____there. Thanks.