1 . On receiving the call， the police rushed to the scene，___a traffic accident happened.（用适当的单词填空）

2 . I like to go shopping on weekdays,__________ the shop isn’t crowded. (用适当的词填空)

3 . The Western holiday Halloween also had its origin in old beliefs about the return of the spirits of dead people. It is now a children’s festival，这个时候他们打扮起来去他们邻居家索要糖果(dress) _____________________________.(根据汉语内容和所给的提示词，完成句子)

4 . Mr. Smith owned this oil painting until the early 1990 s, ____________he gave it to his grandson.

A．which

B．when

C．where

D．who

5 . We will put off the picnic in the park until next week, ________ the weather may be better.

A．that	B．where
C．which	D．when

6 . It was an exciting moment for these football fans this year,________for the first time in years their team won the World Cup.

A．that	B．while
C．which	D．when