The medicine works more effectively ________ you drink some hot water after taking it.
A．as B．until C．although D．if
Owen wouldn't eat anything ________ he cooked it himself.
A．until B．since C．unless D．while
You will be successful in the interview ________ you have confidence.
A．before B．once C．until D．though
People who are really in need of houses will suffer heavy losses ________ the government takes measures to bring down house prices.
A．if B．in case C．unless D．since
________ hard one may work, one cannot master a foreign language in a month or two.
A．Whenever B．Wherever
C．Whatever D．However
________ I really don't like art, I find his work impressive.
A．As B．Since C．If D．While
