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。