预习导航

　　一、我们应该怎样用英语来下达指示呢？

　　1．________________________________________________________________________

　　2．________________________________________________________________________

　　3．________________________________________________________________________

　　4．________________________________________________________________________

　　5．________________________________________________________________________

　　...

　　二、阅读课文"A VISIT TO THE MOON"，根据课文内容判断正"T"误"F"

　　（　　）1．The force of gravity changed three times and the last change was the most powerful.

　　（　　）2．We were too far from the earth to feel its pull.

　　（　　）3．On the moon，our weight would be less than on the earth because we were too far from it.

　　（　　）4．Leaving the moon's gravity was as painful as leaving the earth's.

　　（　　）5．Space travel was very exhausting，so the writer didn't like it at all.

　　三、阅读课文"A VISIT TO THE MOON"，选择正确答案

1．The passage is mainly about ______.