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

A．when

B．if

C．since

D．until

2 . 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

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

A．when

B．where

C．what

D．which

4 . On the eve of the Spring Festival, I usually stay up until midnight, ________I can set off the firecrackers and fireworks.

A．which

B．when

C．where

D．who

5 . October is a great time to visit Inner Mongolia Autonomous Region, ________travelers can go to the quiet Ejina to enjoy the wonderful scenery of Euphratica forest(胡杨林).

A．then

B．where

C．when

D．there