Please tell me how the accident _______．I am still in the dark．
| A．came up | B．came out |
| C．came to | D．came about |
_______the programme, they have to stay there for another three weeks.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
--- 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 |