.--- Is your sister a factory  worker or a doctor?
--- ________________.

----_______is your sister?     ---She is thirteen years old.

A. How many   B. How old     C. How much   D. How long

— Is your sister a League member?

    —Yes, She ___ the League two years ago. She ____ a League member for two years.

A. has joined; has been    B. joined; was    C. joined; has been   D. joins; was

.--- Is your sister a factory  worker or a doctor?

--- ________________.

A．Yes, she is         B．No, she isn’t      C．A factory worker    D．Yes, she is a doctor