(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·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·江西，28)She says that she'll have to close the shop ________ business improves.

A．if B．unless C．after D．when

(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·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·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·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

(2013·四川，7)He is so busy.He cannot afford enough time with his son________he wants to.

A．even if B．as if C．because D．before

(2013·重庆，25)________ we have enough evidence，we can't win the case.

A．Once B．As long as C．Unless D．Since

He smiled politely ________ Mary apologized for her drunken friends.(2012·山东)

A．as B．if C．unless D．though