51. Summer is the best time ( swim ) .

50. The Greens make me (feel) excited.

49. We haven't (decide) where we will go on vacation.

48. You won't have any problems (find) a park in this city.

47. I do (well) in writing than speaking.

46. Have you ever (hear) of the Night Safari in Singapore?

45. —Hi,why were you late for school?

—Oh,it was my ( luck ) day-my bike broke down on the way to school.

44. This is a ( surprise ) story,and I am (surprise) at it.

43. Our teacher is mad at us for ( copy) others' homework.

42. You have such a good father. How (luck) you are!