选择适当的单词填空,把句子补充完整.
1.Do you get an _________(invite/invitaion)to betty's birthday party?
2.Do you want to have some _______(sandwich/sandwiches)or some_____(bread/breads)for lunch?
3.Let's_______(taking/take)some______(shop/shopping)with mum this saturday.What about ________(do/doing)it on sunday?