——______ do you go camping?

——Once a month.

A. How long        B. How often.          C. How many.

_______ is it wasteful to throw away glass and paper?

1. A.
   What
2. B.
   How
3. C.
   Why
4. D.
   How long

____________ does it take her to get to school?

A、How many time            B、How long                C、How far

— ______ will your father come back from New York?

— In two days.

A．How long          B．How many         C．How often         D．How soon