1，Tom lost a set of key last week.（改错） 2，This is

1，Tom lost a set of key last week.（改错） 2，This is
1，Tom lost a set of key last week.（改错）
2，This is my watch and that is hers.(改错）
3，Is that your computer -----the lost and found case?(添介词）
4，Is this your p_______sharpener?（根据首字母填空）
5，He had ______farms.(填a few,few,a little,little)