Question

In my opinion,life in the twenty-first century is much easier than _______.

A．that used to be	B．it is used to
C．it was used to	D．it used to be

Answer

D

【解析】(than)it used to be是比较状语从句，it指上文中的life，used to be表示“过去是”。根据所提供的情景“life in the twenty-first century is much easier than”可判断出表示“以我看来，21世纪的生活比过去容易”。be used to后接动词+ing形式作宾语，表示“习惯于”，其主语一般是表示“人”的名词或代词。