—How do people do bird-watching? 

—Sometimes they______the birds quietly,  sometimes they use telescopes. 

A. catch          B. cast            C.  approach            D.  Shoot

---How do people do bird-watching?

---Sometimes they______the birds quietly,  sometimes they use telescopes.

1. A.
   catch
2. B.
   cast
3. C.
   approach
4. D.
   Shoot

--How do people do bird-watching?

--Sometimes they         the birds quietly; sometimes they use telescopes.

A. catch           B. approach         C. cast          D. shoot

  —How do people do bird-watching? 
—Sometimes they______the birds quietly,  sometimes they use telescopes.