Prepare for IELTS General Training Volume 2

• the icing on the cake: the price I've quoted you includes catering costs.


  something extra and not essential that is added to an already good situation or experience and that makes it even better
• Guests can avail themselves of a special discount on rooms at sister premises opposite


  to make use of something, especially an opportunity or offer
•  they'll also give you a complimentary cake for the occasion.


  (a)given free