You ______ be hungry already — you had lunch only two hours ago!
_______ to the discovery of radium, Madame Curie plays an important role in modernscience.
The couple _________ last week, which surprised their friends and relatives greatly because they appeared that happy all the time.
---Tom hurt his left leg in the game this morning.---Really? It would take at least two weeks ______ he could recover and return to school.
His father insisted on punishing him, but he insisted he had _______ to do with the matter.
---Does Lucy enjoy singing? ---Yes, she does. I have never seen anyone else that is as ________ about singing as she is.