— How did you do in your essay?— I got ______ okay grade, but Mr.Jones gave Sarah top marks.She’s ______ teacher’s pet, you know.
47. Three hundred firemen raced to the hotel after a smoke detector ______ the alarm soon after midnight.
48. Don’t respond to any emails _______ personal information, no matter how official they look.
49. I looked at it and found that including the wine, the bill ______ $70.
50. Is there a gas station around _____ I can get some petrol?
51. We didn’t plan our art exhibition like that but it _______ successful.