集合名词的
1.The class has elected its leader.
这个班选出了它的班长.
2.The class are interested in his lecture.
班上学生对他的讲座都很感兴趣.
1.My family has agreed to take a trip during the holiday.
我们家一致同意假期外出旅游.
2.My family are not in agreement on where to go.
对于去哪里我们家人持不同意见.
2个种句子 为什么每个例句的第2句 be用复数形式,而前面的名词不用复数?