You have promised to join your friend Mike’s party, but now you can’t go. Write to apologize and explain why.
Marks will be awarded for content, organization, grammar and appropriateness.

A．those who engage private teachers to provide additional education for their children
B．those who educate their children at home instead of sending them to school
C．those who advocate combining public education with home schooling
D．those who don’t go to school but are educated at home by their parents

A．they fail to realize how dangerous avalanches can be
B．they are not expert enough at skiing on the fixed runs
C．they are trying to avoid where avalanches happen
D．they ski great distances down the mountainsides