认真阅读下列各句，并根据题干所给的信息，在答题卷上标有题号的横线上填上一个恰当的词，每空一词。

76. - Excuse me, sir. The shoes are a bit large for me.

   - Don't worry. I'll look for a    ▲    pair for you.

77. - What's the   ▲   of the elephant?

   - Oh, it's about 4,500kilograms.

78. - Do you often do    ▲    at home?

   - Yes, I often wash clothes for my mum and clean the house sometimes.

79. - The girl often    ▲    people in need.

   - What a kind and helpful girl!

80. - What's the bird doing over there in the tree?

   - It's    ▲    a small house out of grass for itself

81. - Bill is too busy to help us. Let's do it ourselves, OK?

   - All right. I'm sure we can do it well    ▲    Bill's help.

82. - Could you teach me how to dance?

   - No    ▲    .Let's practice every Saturday afternoon.

83. - Daniel likes eating and he is the    ▲   boy in your class.

   - Yes, nobody else is fatter than he in our class.

84. - Please don't    ▲    to return my book this Sunday, I'll use it.

   - OK. I'll give it back to you this Saturday.

85. - I'm afraid that your clothes are too    ▲    to wear.

   - That's true, I'll wash them at once.