Burglar alarms ________ at any time of the day or night serve only to annoy.
A．go off B．that go off
C．that are going of D．which going off
— Why do you look so worried?
—My computer broke down and my essay ______ unfinished since.
A．had left B．has been left C．has left D．was left
Who will ______ your dog when you all go out for a holiday?
A．keep down B．look for C．attend to D．take to
A man with a big camera in his hands stopped me and asked, “Excuse me! Is there a post office around ______ I can have these posters sent to my friends?”
A．that B．which C．where D．what
—The frequent terrible coal mine accidents killed more than 1000 people in China last year.
—_______.
A．That’s the case B．Quite OK C．Certainly D．I agree
sales of cars up by 30% last year, the traffic in Beijing has become increasingly terrible.
A．As B．Since C．For D．With
