The Nuclear Security Summit is an initiative of Mr. Obama, considers nuclear terrorism to be one of the greatest threats to international security.
Susan was expecting her favourite singers, but to her disappointment, ______ appeared.
It was ______ great shock to the girl when _____ word came that her close friend died in the severe earthquake of Haiti.
— Who would you rather _____ your graduation ceremony tomorrow, your parents or friends? — All of them.
In terms of the knowledge of science, few students in our class can really ______ Christopher.
Remember to pack more winter clothes into your suitcase. The winter in Chicago _____ be extremely cold.