题目内容：

根据句意和首字母提示填空，每空一词。

1.U ______ for him, Jack had his leg broken on the first day of this May Day holiday so he missed all the fun.

2.Since the  outbreak of  COVID-19,  millions  of  Indian workers have f ______ from big cities to their hometowns.

3.Before  the volcanic e ______ of Mount Vesuvius, Pompeii was a busy city with lots of temples, workshops, restaurants and theatres.

4.English, Chinese, French,Russian, Spanish and Arabic are the o ______ languages of the United Nations.

5.U ______ Pompeii, which was buried overnight, the ancient Chinese city Loulan was gradually covered over by sandstorms.

6.I have been so o ______ with my work that I haven’t had time for social activities.

7.Chicago, a busy port on the Great Lakes, is the largest industrial and ______ (商业的)center of the area.

8.From the analysis of many successful cases in job hunting, we can draw a ______ ( 结论)that first impressions count.

9.When asked why she had green fingers, Mrs.Black explained she learned about gardening just by ______ (试验)and error.

10.Due to the coronavirus emergency, a Japanese city cut down about 800,000 tulips(郁金香) to discourage people from ______ (涌入)to admire them.