问题补充:
A study has found that 80% of the people who to be constantly distracted more “working memory”.
A. appears; have
B. appear; has
C. appears; has
D. appear; have
答案:
A. appears; have
B. appear; has
C. appears; has
(答案→)D. appear; have
解析:考查主谓一致。定语从句的关系代词who指代先行词the people在句中做主语,谓语动词用复数;第二空是句子真正的谓语动词,主语是80% of the people,谓语动词用复数。