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the guests ___ my home on time last weekenda.got b.arrived c.is invented d.was invented

题目详情
the guests ___ my home on time last weekend
a.got b.arrived c.is invented d.was invented
▼优质解答
答案和解析
d.was invented
a和b都缺少介词
c是现在时,句子是过去时态.