用所给词的适当形式填空

     （1）It is usuall_____(crowd)at weekends.
       (2) We use dictionaries_____(look)up the words.
  2. 句型转换.
      （1）They're  talking about the weather.(对画线部分提问）划线部分是the weather
               _____  _____they talking about?
        (2)Whose knife is this?(同义句）
             ______is this______?
        (3)There are over sixty students in our class .(同义句）
             There are _____  _____sixty students in our class.
        (4)My holiday was wonderful.(对划线部分提问）划线部分是wonderful
            _____  ______your holiday?
        (5)Mary studies very hard.(改为感叹句）
            ______  ______Mary studies!