Question

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

A．what used to be	B．that it used to be
C．it used to be	D．what it used to be

Answer 1

D

考查宾语从句。used to do“过去（常常）”；be缺少表语，用what；句意“在我看来，21世纪的生活比过去的生活容易的多。”。故选D。