1 . 在英国的几乎所有地方，你都发现有四批不同的人在整个历史的不同时期占据政权的痕迹。
Almost everywhere you go in the UK, you will be surrounded by evidence of four different groups of people who ______ at different times throughout history.

2 . 我上周末忙于写信给我的朋友们。(occupy)
I _________________ to my friends last weekend.

3 . 他们托着下巴，全神贯注地盯着别的东西没看我一眼。
With their chins on their hands, they ________ ________ by staring out of the window or up at the ceiling.

7 . 上周他忙于办公室的日常工作。（occupy）
He _________________________ routine office tasks last week.

8 . 我一直忙于学习，以致于没有时间去搞社交活动。
I ________________ that I haven’t had time for social activities.

10 . 他忙于准备期中考试。
He ______ ______ ______ preparing for the mid-term exams.