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。