—I called you at 4:00 yesterday afternoon, but no one answered.—Sorry, I ______ with my friends at that time.
--–Excuse me, ______is Qinhuangdao from Beijing?----It’s about three hours by car.
—We'll go to visit Chengdu next week.—_____
It ______ forty-five minutes ______ there by bus.
---- why not swim in the river?---oh, no. our teacher told us _____ here. It’s dangerous.
I can’t swim. And she can’t, _______.