Shall we buy some postcards for the exchange students?

Shall we buy some postcards for the exchange students? Why____(not buy)some postcards for the exchange students? Shall we buy some fruit? Shall we buy some soft drinks Shall we buy some fruit?(同义句) We will have a welcome party for the exchange students.(同义句） they wondered,“shall we buy some food for picnic变间接引语they wo 直接引语变间接引语They wondered."Shall we buy some food for picnic?"此 Shall we buy Millie some flowers for her birthday?同义句 We went to the gift shop and _____ some postcards. what shall we buy for Father? shall we buy some apples?为什么用some,不用any?