用括号内单词的适当形式填空：

Winter is coming. I'll go and buy a ________ sweater.(wool)

用括号内单词的适当形式填空：

She was ________ to see a king's hat in the museum.(surprise)

用括号内单词的适当形式填空：

You know, America is very rich. It is a ________ country.(develop)

用括号内所给单词的适当形式填空：

Today is a ________ (snow) day.