◎ 题干
Yesterday I _____ a boy _____ in the next room.
[     ]
A. heard; sings
B. hear; to sing
C. heard; sing
D. heard; to sing
v
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“Yesterday I _____ a boy _____ in the next room. [ ]A. heard; sings B. hear; to sing C. heard; sing D. heard; to sing v…”主要考查了你对  【实义动词的过去式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。