A study has found that 80% of the people who to be constantly distracted more “working m

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。