内容提示：李平和张新正在观看男子100米决赛，李平认为一班选手取胜的可能性较大，其他三个班的选手也不能低估。比赛结果出乎意料，2班的选手最先冲过终点线，全场为之欢呼。

根据中文提示，完成下列对话，每空一词.

Li Ping： Who will 　1 　 the boys' 100-metre race?

Zhang Xing： I'm not 　　 　2 　. Maybe Class 1 will win the race. Its runner is 　3 　the school team and got first last year in our school.

Li Ping： But Class 4 can run very fast, so 　　 　4 　Class 2 and Class 3. It's 　　 　5 　to say who will be the winner. Let's watch the race.

Zhang Xing： Look! All the runners are 　　 　6 　the starting line. Oh, they rush out（冲出来）.

Li Ping： How fast! Class 1 is in 　　 　7 　only a little, but the other three are almost 　　 　8 　and neck behind. Oh, the runner of class 2 runs ahead（在前）. He runs faster and faster. Great! Class 2 wins.

Zhang Xing： Well 　　 　　 　9 　, everyone! 　　 　　 　10 　to the winner.

　　Scientists have always wanted to know more about the universe. Years ago they knew many things about moon. They knew how big it was and how far away it was from the earth. But they wanted to know more about it. They thought the best way was to send men to the moon. The moon is about 384 000 kilometers away from the earth. A plane cannot fly to the moon because the air reaches only 240 kilometers away form the earth. But something can fly even when there is no air, that is a rocket (火箭) .

　　How does a rocket fly? There is gas (气体) in the rocket. When the gas is made very hot inside the rocket, it will rush out of the end of the rocket and make the rocket fly up into the sky. Rockets can fly out into space. Rockets with men in them have been to the moon. Several rockets without men in them have flied to another planet (行星) much farther away. One day rockets may be able to go to any place in space.

(1) Scientists have known ________ the moon is.

[　　]

(2) The earth is about 384 000 kilometers away form the ________.

[　　]

(3) A plane cannot fly to the moon because ________.

[　　]

A．there is no air above 240 kilometers away from the earth

B．there is no gas in the plane

C．the plane is not strong enough

D．the plane must be driven by a man

(4) The hot gas in the rocket is used for ________.

[　　]

A．keeping the air in the rocket fresh

B．keeping the men in the rocket warm

C．making the rocket fly up

D．cooking food for the men

(5) Several rockets without men in them have flown to ________.

[　　]

A．the stars

B．the satellites of the sun

C．the sun

D．another satellite of the sun