Ⅰ.Read the passage and judge whether the following sentences are true (T) or false (F)．
1．The force of gravity changed three times and the last change was the most powerful.( F )
2．We were too far from the earth to feel its pull.( T )
3．On the moon, our weight would be less than on the earth because we were too far from it.( F )
4．Leaving the moon's gravity was as painful as leaving the earth's.( F )
5．Space travel was very exhausting, so the writer didn't like it at all.( F )
