—When did you meet Jack for the first time?—I met him________the airport________National Day.
China’s sport stars Yao Ming and Liu Xiang _____ Goodwill Ambassadors(亲善大使) for Shanghai.
Digital cameras are becoming very popular, though some still _____ too much.
Who can tell me _____ at the meeting?
— Must I finish that work today? — No, you _____. You may finish it in three days.
In the United States, Father’s Day falls on _____ third Sunday in _____ June.