I've become good friends with several of the students in my school I met in the English speech contest last year.
| A．who | B．where | C．when | D．which |
--- Is Mr. Smith in the office?
--- Yes，_____ he is in charge of the office，he must be there.
| A．however | B．since | C．whether | D．for |
He moved to Germany in _____, when he was in _____.
| A．the late 1990s; his sixties | B．late 1990s; his sixties |
| C．the late 1990s; the sixties | D．late 1990s; the sixties |
______ the day went on, the weather got worse.
| A．With | B．Since | C．While | D．As |
---- Which city will be host city for the next Olympic Games?
---- London.
| A．a | B．/ | C．the | D．an |
He tried to deal with the ever-increasing burden of his work，but finally _____ and had to take a complete rest.
| A．broke away | B．broke up |
| C．broke down | D．broke out |