Lily doesn’t have a computer.Lucy doesn’t have one,either合并为一句
＿＿ ＿＿ Lily ＿＿ ＿＿ Lucy ＿＿ ＿＿ a computer
我觉得应该填not only Lily but also Lucy doesn’t have a computer
答案上是not only Lily but also Lucy has not have a computer