–Where are the students? How could they keep us waiting for so long? –They started an hour ago and they ____ be here in fifteen minutes, I think.
— Is Paul playing both soccer and tennis for the school? — He ______. But now he has given up playing tennis.
______ at failing in the math exam, John wouldn’t like to talk about it to his parents.
The form cannot be signed by anyone ______ yourself.
Some plants can take in carbon dioxide we breathe out and give ______ oxygen to us.
— If you like I can do some shopping for you. — That’s very kind of you for your ______.