皮皮学，免费搜题
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搜题
【单选题】
You _____ across the road without looking round; you _____ down by a car.A.
shouldn’t run, might have been knocked
B.
shouldn’t have run, might have been knocked
C.
mustn’t run, could have been knocked
D.
mustn’t have run, could be knocked
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Mary is hard-working. She _____ one hour doing her homework every day.
A.
spend
B.
spent
C.
spending
D.
spends
【简答题】作业主题:济南“宽厚礼”主题文创设计
【简答题】在教学活动中，学生是学习的主体，教师起( )作用。