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 puter 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 .whose city walls remain as good as before
网友回答
(答案→)whose city walls remain as good as before
解析：
试题分析:
【小题1】简单句变成复合句，由连词构成，whose是个引导词，是个定语从句
【小题2】sb spend money/time (in) doing sth相当于It take sb money/time to do sth
【小题3】把主动时态的宾语做主语时，用被动式
【小题4】把主动时态的宾语做主语时，用被动式
【小题5】too…to…相当于so…that…但是that后面是否定式