Your teacher of maths has taught you when to 

　　1． ________

find the centre of a circle! It takes sometime． 

2． ________

　　Here is a simple method．

　　　　Put the corner of a sheet of paper in the 

　　3． ________

circumference (圆周) of the circle, then make 

4． ________

points A and B which the sides of the paper 

5． ________

across the circle． You may be sure that points

6． ________

A and B mark the end of a diameter (直径)． 

7． ________

To draw it, then repeat this process at a 

8． ________

different place to get other diameter．

9． ________

You will find the centre where two lines cross． 

10． _______

　The children next door often play the football in

1． ________

a garden behind my house and sometimes break my

2． ________

windows． Last Saturday aftenoon I stay at home and

3． ________

read a book． After a while, I closed my eye and went

4． ________

to sleep． A loud knock on the door made me to wake

5． ________

up suddenly． Soon a little boy turned out．“You haven't

6． ________

broken one of my windows again? ” I asked． “Oh, no! ”

7． ________

answered the boy． “Your windows were all opened this

8 ．________

time but our football is in your bedroom． Would you

9． ________

mind me to get in to get our ball? ”

10．_______

　The Dead Sea is really a large 　　 lake．

The river Jordan flows into it． It's

1． ________

surface has an area of over a thousand

squares kilometres． Because there

2． ________

is no outlet and the climate is very hot,

the water is slow dried up． 

3． ________

The water in the sea is an unpleasant 

4． ________

smell and a very salty bitter taste． It is

full of salt and another minerals． Human 

5． ________

body will not sink in it． Man can sit up 

6． ________

there and to read newspapers without sinking, 

7． ________

but it is not a good place for swimming,

so the water is bad for the skin．

8． ________

No alive thing can live in it． That

9． ________

is because it is called the Dead Sea． 

10． _______

　　After supper Li Hua came and asked me go

(1)________

and see a film with him. In our way to

(2)________

the cinema we saw the little girl sitting by

(3)________

the roadside cry. We bought her a cake to

(4)________

stop her crying. But when we asked where she

(5)________

had lived she said she did not know. So

(6)________

when we took her to the police station and

(7)________

asked the police to take care for her. After

(8)________

this we went to the cinema．But when we

(9)________

got there the movie was near at its end．

(10)________

We missed the movie,but we did a good deed,

　Mr． 　　 Brown was very deaf and he didn't like people

1． 　　 ________

to know this． One day he had invited few friends to

2． ________

dinner, and while they were seating at the table, one

3． ________

of his friends talked a funny story． Everyone laughed

4． ________

and Mr． Brown, had laughed as loud as anyone else, said,

5． ________

“That was a very funny joke． but I know a more funnier

6． ________

one． Would you like hearing it?” They all said they

7． ________

would, so Mr． Brown began his story． When it ended,

8． ________

everyone laughed louder as ever and Mr． Brown smiled

9． ________

happily． But he didn't know the reason of their laughing．

10． _______

He had told the very same 　　 story his friend had just told．

The other day I woke up early. I am going to

1．________

give talk at an important meeting in the town

2．________

at 10 a. m, because I wanted to get there early.

3．________

I went into the bathroom and turned on the

4．________

water for my bath. Then I went into the chicken.

5．________

I put some milk in a pan, light the gas and

6．________

put the pan on the gas ring. I just put the pan

7．________

on the gas ring then the door bell rang.

8．________

I went to the door, opening it a little and

9．________

put my head round it. I couldn't see nobody,

10．________

but there was a letter on the floor.