53. You can send flowers a_______ of time for Mother’s birthday.

52. Money is a_______ in some situations.

51. I need a pair of warm trousers to keep o________ cold.

50. Many advertisements are aimed specifically a______ teenagers, so you have to be careful.

49. The cake t_________ delicious. Would you pass me one more?

48. How do you feel a________ pollution?

47. I want to eat something because I am k_______ of hungry.

46. We should protect e_______ animals.

45. I felt _______(embarrass)when everyone looked at me.

44. I’m considering _____(study)in Beijing or Shanghai.