定语从句,that指代的是narrow streets and small houses
你可以这样理解
The old town has narrow streets and streets.
Narrow streets and small houses are built close to each other.
what一般引导主语从句,本身就具有代词的意思如:什么,东西,事情等
定语从句,that指代的是narrow streets and small houses
你可以这样理解
The old town has narrow streets and streets.
Narrow streets and small houses are built close to each other.
what一般引导主语从句,本身就具有代词的意思如:什么,东西,事情等