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
She says that she'll have to close the shop ________ business improves.
A. if B. unless
C. after D. when
Mark needs to learn Chinese ________his company is opening a branch in Beijing.
A. unless B. until
C.although D. since
________ I have to give a speech, I get extremely nervous before I start.
A. Whatever B. Whenever
C. Whoever D. However
________ small, the company has about 1,000 buyers in over 30 countries.
A. As B. If
C.Although D.Once
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