How does the Internet ____us? —By sharing information free of charge．

The moment I got back to the classroom, I found I _______ my jacket on the playground.

Mr. Peterson ____ haveforgotten to buy presents for his beloved family members. After all, it wasChristmas!

下面名句中没有错别字的一项是（ ）

When we were young, every evening my brother and I ______ stay at home waiting for our mother to come back from work.