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.( ) 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.( )