Question

【题目】Half of the class _____ done most of the work ．The left _____ rather difficult．

A． have ; is B． has ; is

C． have ; are D． has ; are

Answer 1

【答案】A

【解析】解析过程：考查主谓一致。一半的同学完成了大部分工作，余下的相当难。class同学们，表示复数含义，谓语用复数; the left余下的，the +adj.指事物时，看作单数，故选A。