(2013·江西，28)She says that she'll have to close the shop ________ business improves.
A．if B．unless C．after D．when
(2013·江苏，28)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
(2013·湖南，23)You must learn to consult your feelings and your reason________you reach any decision.
A．although B．before C．because D．unless
(2013·北京，30)I took my driving license with me on holiday，________I wanted to hire a car.
A．in case B．even if
C．ever since D．if only
________ that Marie was able to set up new branches elsewhere.
A．So successful her business was
B．So successful was her business
C．So her business was successful
D．So was her successful business
Scientists generally agree that Earth's climate will warm up over the next 50 to 100 years ________ it has warmed in the 20,000 years since Ice Age.
A．so long as B．as much as
C．as long as D．as well as
