.The number of articles published on smoking ______ amazing.

________ I got on the bus, he got off.

Theplay nextmonth aims mainly to reflect the local culture.

I’ll call Bob and tell him the good news.—You __________ do that. He was here just now and heard it.

Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.