David was always ______ his best in any danger, but at that moment he froze.
He worked day and night, and finally his dream ________ a teacher ________.
We have every reason to believe that ________ 2010 Shanghai World Expo will be ________ success.
— Manager, I’d like to take a week’s holiday.— ________. We’re too busy nowadays, you know.
This house is _____ that one.
—Well.Randy is not quite ready to make a decision yet. —So,_______ ,we have to wait,right?