根据句子要求转换句型（共5小题，每小题2分，满分10分）
小题1:Xi’an is one of the few cities with city walls. Its walls remain as good as before. (两句合为一句)
Xi’an is one of the few cities __________________________________________.
小题2:She didn’t spend much time in reaching the standard for entering the Olympic Games. （同义转换）
___________________________________ the standard for entering the Olympic Games.
小题3:His mother told him not to waste time on computer games. （改为被动句）
___________________________________________________________________
小题4:By now, the government has spent a lot of money in protecting the old temple. （改为被动句）
____________________________________________________________________
小题5:And my memory became too large for me to believe it. （同义转换）
And my memory became ____________________________________________.