There were __________ animals in the forest many years ago.

Which is            of the two boys?

Yaoming is one of            in the world.

Our rooms are bigger than          .

— Our teacher told us that these exercises were __________.

— Really?

He is the tallest __________ the three.

Insects __________ plants.

— The man in the red car __________ his father.

— Yes. I think so.

A: Summer holiday is coming.   1 ?

B: Yes, I’m going to my hometown.

A:   2 ?

B: For about a month.   3 ?

A: I want to travel to Hainan Island. It’s a beautiful place of interest.

B:   4 . But I have to visit my grandparents in my hometown.

A: It doesn’t matter. If you stay in your hometown for fewer days, you’ll have enough time to go

traveling.

B:   5 . Then I will go to my hometown as soon as the holiday begins.

A: OK! I will wait for you until you come back.

B: That’s a deal! Thank you.

1.                                 

2.                                 

3.                                 

4.                                 

5.                                 

　 We know that trees are useful in our everyday life. They   1  us many things, such as wood, oxygen, rubber, medicines and many other things. They can  2  tell us a lot about our climate. The following are the reasons. If you   3  a tree, you can see that it has many rings. Most trees grow one new ring   4  year. Because of the reason, we know   5  a tree is. A tree over a hundred years old means that it has more than a hundred   6 . When the climate is dry or very cold, the trees do not grow very much and their rings are usually   7 . When it is wet and warm, the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this means that the   8  changed suddenly. If we look at the rings on this tree, we can learn about the   9  for a hundred years. We can see  10  our climate is changing today.