Question

Young people tend to get up very late unless ________ to rise early. A．required B．requiring.

Young people tend to get up very late unless ________ to rise early. A．required B．requiring C．they were required D．to require

Answer 1

A

考查非谓语动词。当unless引导的状语从句与主句主语一样时，可以省略，用they are required，故选A。