_______ fun it is to jump into a pool or go swimming in summer.
The Smiths are praised _______ the way they bring up their children.
I am always delighted when I receive an e-mail from you. ______ the party on July 1st, I shall be pleased to attend.
An artist who was recently traveling on a ferry to the southern island discovered ______ a long lost antique Greek vase.
Mrs. Smith finds it hard to clear up the mess, as her children are always ____ whenever she tries to.
(2013·北京卷) I have an appointment Dr. Smith, but I need to change it.