—Why are you in such a hurry, John?—There _______ an NBA basketball game in ten minutes.
The box is _____ heavy _____ carry.
They are the girls who _____ from No. 1 middle school.
Dolphins are rare, but sometimes it is possible _______ them near here.
I ____ have supper until my mother ____ back every day.
—_____ have you travelled abroad with your parents?—Only twice.