Thank you for me with my English.

What’s _____most useful invention in the 20th century? —_____ computer, I think.

We still don’t know what _________ while we were away from home.

All the students will have a party ____ the afternoon of January 1.[ ]

In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs,…