1 . The origin of facial makeup used in Peking Opera can date back to more than 1,400 years ago, ________ leading actors used to wear masks. （用适当的词填空）

2 . We’ll graduate in July, __________ (那时我们将去西藏旅行). (根据汉语提示完成句子)

3 . We will put off the picnic in the park until next week, ________ the weather may be better. (用适当的词填空)

5 . Between the two parts of the concert is a break, ________the audience can purchase ice cream. (用适当的词填空)

6 . 他明天将来这里，那时他有空。（非限制性定语从句）（汉译英）

7 . We will put off the hiking until next week, ________ the weather may be better.

A．that

B．when

C．which

D．where

8 . （2022·宁夏石嘴山·一模）Chen showed that knowing how to perform CPR can be beneficial. According to medical experts, there is a “golden period”, the first four minutes of a heart attack, ________CPR is most effective in saving the person’s life. (用适当的词填空)

10 . My connection with pandas goes back to my days on a TV show in the mid-1980s, ________ I was the first Western TV reporter. （用适当的词填空）