(2013·陕西，18)I have heard a lot of good things about you ________ I came back from abroad.
A．since B．until C．before D．when
(2013·山东，28)________I have to give a speech，I get extremely nervous before I start.
A．Whatever B．Whenever C．Whoever D．However
(2013·山东，26)Mark needs to learn Chinese________his company is opening a branch in Beijing.
A．unless B．until C．although D．since
(2013·辽宁，24)One can always manage to do more things，no matter________full one's schedule is in life.
A．how B．what C．when D．where
(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
