用am，is，are填空：
（1）Where        you from ?I       from China .
（2）Where        he from ? He       from England  .
（3）What        your mother ? She        a teacher .
（4）I       Number One .
（5）She        in Class One , Grade Two .
（6）We       good friends .
（7）It        a pear .
（8）         you sure ?
（9）        ten and ten twenty ?
（10）       it green or red ?