Could you tell me where the bookstore is—– ____________ I didn’t hear clearly.

___ himself with confidence, the young manwent to the manager’s office bravely

What were you doing when I called you at 8 p.m. yesterday —I the piano at that time.

The population of China is larger than ________ of Japan.

It is a mainly dry country with only a few coastal areas that have ____ rainfall to support a large population．