– Either you have made a mistake or he has.--- I _________.
So absorbed _____ in the experiment that he didn’t even notice it was already over 12 o’clock.
Tell your doctor with a detailed medical history ______ he can give you the accurate treatment.
— Nowadays people seem to be becoming more and more selfish. — How much better life would be if we ______ to the values of the past!
— Who _____ be phoning us at this time of night? — It might be your sister.
— You have helped me a lot. I can’t thank you enough. —______.