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学历类 > 自考 > 自考专业(英语) > 现代英语语法 > is, are, has, have, having The average British family, which ________ smaller and richer than 50 years ago, ________ 3. 6 members.
is, are, has, have, having The average British family, which ________ smaller and richer than 50 years ago, ________ 3. 6 members.