According to the timetable,the airplane will cover the ________from Beijing to Shanghai in an hour and a half.
—Look at these tracks. It __________ be a wolf. —It needn't be. It be a fox.
He didn’t seem to mind_____________ TV while he was trying to study
Travelers_______________ that they should bring their ID cards with them.
I don't skate now, but I___________ when I was a kid.
—Our holiday cost a lot of money. —Did it? Well ,that doesn't matter____________ you enjoyed yourselves.