Mum, may I have some cakes—-Sorry, there’s _______ left in the box. I’ll go and buy some for you tonight.

As the busiest woman in Norton, she made _____ her duty to look after all the other people’s affairs in that town.

下列句子没有错别字的一项是（ ）

______ do you go skateboarding — Twice a week.

My English-Chinese dictionary isn’t in my schoolbag. Where _________ I have put it?