If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.

A. habit       B. law         C. rule         D. custom

If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.

     A. habit     B. law     C. rule     D. custom

If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.

A. habit     B. law     C. rule     D. custom

If you want to see a doctor, fix the date with him ahead of time. This is a common _________ in the USA.

A. habit　　 B. law　　 　　　C. rule　　 　　D. custom

If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the US

1. A.
   A. habit
2. B.
   law
3. C.
   rule
4. D.
   custom