John Logie Baird constructed the first color TV in 1928, but it was not until 1938 ______ the first color TV programme was broadcast.
| A．when | B．what | C．which | D．that |
At 60 the famous film star Dustin Hoffman is at a point in his art career _______ the chances are narrowing but the roles seem stronger.
| A．where | B．that | C．which | D．when |
The government has taken some measures to solve the shortages of electricity, but it may be some time _______ the situation improves.
| A．since | B．when | C．unless | D．before |
Li Ping is the only one of the students whom I think _______ fit for the job.
| A．being | B．is | C．to be | D．be |
________ five minutes ______ before the last bus left, we arrived at the station.
| A．There were; to go | B．With; to go | C．It was; left | D．It had; left |
I am moving to the countryside because the air there is much fresher than _______ in the city.
| A．ones | B．one | C．that | D．those |