---When did you see the bird last night?---It was at about ten thirty ______ I got home.
John opened the door . There _____ he had never seen before.
If we ___ the other road ,we might have arrived here in time for the meeting.
You look well . The air and the sea foods in Sanya must _____ you , I suppose.
--What's the noise ? It sounds as if it comes from upstairs.
--.It must be the window-cleaner working , next door.
The cost of renting a house in central Xi’an is higher than ____ in any other area of the city.