In aerospace devices the weight of the necessary power producing equipment is _____.
There are enough cups for each visitor to have _______.
– 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.
– So kind of you to give me a ride to the station. – ___________