补充句子
数笔画填空。
“互”共有____笔，第3笔是 ____。
“洗”共有____笔，第9笔是 ____。
“俩”共有____笔，第5笔是 ____。
-- It's difficult for the village children to cross the river for school.
-- I think a bridge ________ over the river.
我国是个多民族的国家，其中少数民族有
