3．Why CAN'T the spaceship fall back to the earth?

　　A．Because the moon's gravity pulls it up.

　　B．Because it is too far away from the earth.

　　C．Because the earth has no gravity.

　　D．Because the spaceship is not very heavy.

　　4．When I was on the moon I felt I was ________than on the earth.

　　A．slower　 B．heavier

　　C．cleverer D．lighter

　　【答案】　1－4　BABD

　　　阅读P30－P31教材课文，在下列表格的空白处填入一个最恰当的单词

Last month，I made a trip into 1.________with my friend Li Yanping，a(n)2.________.The following are our experiences. Periods Our experiences The journey

from the

earth to

the moon Three changes in the force of the gravity：

►With the rocket rising into the air，we were 3.________back into our seats because of the strong 4.________of the earth's gravity.

►The 5.________lessened as we moved far away from the earth.

►When getting closer to the moon，we felt pulled by the moon's 6.________，but it was not as strong as the earth's. On the

moon ►We weigh 7.________than on the earth.

►While trying to step forward，I found I was carried 8.________as far as on the earth.

►It took a bit of 9.________to walk on the moon. Returning

to the earth ►Leaving the moon's gravity was less 10.________than leaving the earth's.

►Returning to the earth was very 11.________because fire broke out on the outside of the spaceship as the earth's gravity 12.________.

►We were pushed hard into our seats again when we came back to land.