48. He looked around but could see nobody.

他四处望了一下，看不到什么人。

49. He turned around as he heard a noise behind him.

他听到身后有响声，便转过身来。

50. I will visit you around Christmas.

我将在圣诞节前后去拜访你。

51. My sister is around your age.

我妹妹和你年龄相仿。

52. I arranged the flowers in the vase as soon as I came back home.

一回到家里，我就把花在花瓶里插好。

53. I have arranged with him to meet at the restaurant.

我和他约好在饭馆见面。

54. I have arranged that one of my staff will meet you at the airport.

我已经安排好派一个职员到飞机场接你。

55. We arrived home late.

我们到家时晚了。