Another group of Qing Tombs sits about 100 kilometres ______ of Beijing．
| A．at the west | B．the west |
| C．to west | D．west |
There's no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
| A．since | B．if |
| C．as | D．while |
There are some health problems that, when ________ in time, can become bigger.
| A．not treated | B．not being treated |
| C．not to be treated | D．not having been treated |
In the global economy, a new drug for cancer, ________ it is discovered, will create many economic possibilities around the world.
| A．whatever | B．whoever |
| C．wherever | D．whichever |
Don't turn off the computer before closing all programs, ________ you could have problems.
| A．or | B．and |
| C．but | D．so |
I was glad to meet Jenny again, ______ I didn't want to spend all day with her.
| A．but | B．and |
| C．so | D．or |