1 . The modern history of the U.S. dates from 1860, ______ the country became united.

A．when

B．if

C．since

D．until

2 . 我将乐意在您方便时接受面试，届时我将进一步介绍自己。(汉译英)

3 . My life as a tax­paying employed person began in middle school, ________, for three whole days, I worked in a baking factory. （用适当的词填空）

4 . Don’t forget to show up at 5 pm, ________ we gather to go back to school together at the entrance to the Cherry Blossom Garden. (用适当的词填空)

5 . The New Year’s Eve dinner for Chinese people is a very special moment, ______ they share pleasure and food with their family members and friends.

A．where

B．when

C．that

D．during that time

6 . On Good Friday, ________Christians observe the day, on which Christ died, hot cross buns are sold. （用适当的词填空）

7 . “Jugendfeier“ began in the 19th century, ________awareness of civic practices was increasing.

A．when

B．where

C．what

D．which

8 . 每年五月的第二个周日为母亲节，那天孩子们向母亲表示感恩和爱。(celebrate)(汉译英)

9 . In the U. K. , from August to October 2021, ________ the Delta strain was prevalent, the country reported 16 COVID-19 deaths per 100, 000 people. (用适当的词填空)

10 . Do you believe a sneeze in the morning can kill you in the afternoon? This happened in 1918, ________ a deadly form of influenza swept across the world. (用适当的词填空)