This UFO is easy to make and fun to fly .这句话的意思?为什么make 前加to .为什么fly 前加to 和为什么fun 放在to fly 前

This machine is very easy to This machine is very easy to this food is easy to digest,能否说this food to digest is easy.为什么 This UFO is easy to make and fun to fly .这句话的意思?为什么make 前加to .为什么fly 前加to 和为什么fun 放在to fly 前 This machine is ______(easy to undrestand) to ues. this is an easy This exercise is easy to do.(改为复数形式) This work is easy enough to him do 为什么This pen is easy to write with.可以变成This is an easy pen to write with? this problem is ______ for you to answerA easy enoughB too easyC enough easyD so easy I think this question is easy to answer.和I think this question easy to answer.哪个正确? it is easy to Goldfish is easy to take care of this question is too difficult to answer it改错 This is very easy（介词或副词）him to do this work is this book( )read easy enough to for him对吗 或者是easy enough to for him do 英语改错 This article is interesting,informative and it is easy to read越快越好 This pet is unusual.It is easy to take care of and it takes. IF THIS IS LOVE,LOVE IS EASY.IT'S THE EASIEST THING TO DO!出自哪首歌?