The Nuclear Security Summit is an initiative of Mr. Obama, considers nuclear terrorism to be one of the greatest threats to international security.
Mr. White gets up early and runs every day, which he thinks is____ to his health.
The sign reads ‘‘in case of___ fire, break theglass and push_____ red button.’’
. -----I’m thinking of the test tomorrow, I’m afraid I can’t pass this time. -----_________! I’m sure you’ll make it.
The Great Wall is ______ tourists attraction that millions of people pour in every year.
It ___ have been Tom that parked the car here , as he is the only one with a car. A may B can C must D should