The post office starts its business at （）every weekday.

A．the weather often changes
B．she likes to do so
C．she has to walk home after work
D．it always rains when it's time to go home

A．After getting into the plane Henry found his seat and sat down at once.
B．Henry sat down in his seat and fastened the seat bch without any help.
C．Thanks to the air hostess, Henry knew how to find his seat and fasten the seat belt.
D．With the help of the hostess, Henry got into tm plan