補全對話從方框中選擇最佳選項完成對話。

   A. Is man the longest living animal in the world?

   B. how long can a butterfly live?

   C. it depends on what kind of dog it is.

   D. how much does an insect weigh?

   E. an ordinary cat weighs about a few kilos.

Teacher： Does anyone know how heavy a cat is?

Boy： I think 1

Teacher： And 2

Girl： Only a few grams,Tm sure.

Teacher： Right. So...A cat weighs many times more than an insect.

Girl： And what about the difference between a dog and a giant panda in size?

Teacher： Well,3 But I would say that a big dog is just less than half the size of a giant panda. 

Boy：I have a question!4 

Teacher: No,that's a giant turtle. But a man can live for nearly a hundred years nowadays. That's quite long.

Boy： And 5 Can it live as long as a man? 

Teacher： No,a butterfly only lives for a few days. 

Girl： What a short life!

Teacher： Yes,many insects have very short lives.

1. 2. 3.

4. 5.

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