阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空格处填入一个适当的

词或使用括号中词语的正确形式填空。

    “Wow, can you believe our winter vacation  (start)?”

    “I know, Jim. You and  (you) sister will have two  (week) of winter fun,” said Dad.

    “I remember fun you and Susan had last year,” said Mom as she gave the carrots to Jim.

      Susan (start) to laugh. “Hey, Jim. Do you remember that Dad and Mom tried
  (ride) down the steepest (最陡的) hill together on the toboggan (平底雪橇)?”

   “Of course I remember!” said Jim. “I laughed  hard that I fell down.”

    “But not as  (hard) as I did,” said Dad. “It's good thing that I was wearing my ski suit.”   

   “Let's have a different kind of fun this vacation,” said Mom  (happy).