- It seems to me traveling by plane is dangerous.- I don’t think so. ______ planes have the best safety records.
– I’m going to Mary’s birthday party. Bye, mom. --_______, David!
Look! There are some birds _______ in the sky. They are very beautiful.
You’d better _______ the test paper before handing it in.
Nancy, sweep the classroom, _______?
The dog _______ played with you just now is _______.