There __a group of visitors in the museum.They're all lucky enough to get ___tickets
问题描述：
There __a group of visitors in the museum.They're all lucky enough to get ___tickets
A is;free B are;free C is;freely D are freely
答
B are;free
主语 a group of visitors 是复数, 用are
free tickets 免费票
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祝学习进步对了15minutes' walk找不到只有15minutes B 15-minute C 15 minute's D 15-minutesB 15-minute