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he__ the display for several minutes before re-entering his shopa) was gazing atb) gazed atc) had gazed atd) had been gazing at
题目详情
he__ the display for several minutes before re-entering his shop
a) was gazing at
b) gazed at
c) had gazed at
d) had been gazing at
a) was gazing at
b) gazed at
c) had gazed at
d) had been gazing at
▼优质解答
答案和解析
c) had gazed at
分析：before 引导的从句,主句一定要用完成时.
分析：before 引导的从句,主句一定要用完成时.
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