The development of pills often owe ________ to science-we started with a drug that we hoped would be effective in heart disease and we ended up with a medicine that was highly effective against nerve disorder.
A.much chance B.much chance as C.much to chance as D.as much to chance as
Once upon a time, with roots that go back to medieval marketplaces ________ stalls(货摊) that functioned as stores, shopping offered a way for people to get socially connected.
A.featuring B.featuring in C.featured D.featured in
China is a racially mixed country, in which various ethnic(民族) groups bring their own unique flavors to each corner of the country, which adds ________ people's table.
A.to great variety of B.great variety to
C.to a great variety of D.the great variety to
The use of the telescope to observe the heavens close up has made ________ great increase of our knowledge of the starts.
A.possible B.it possible C.possibly D.it possibly
________ to a colorful campus culture, students should draw a line between what is their major concern and what is of ________ importance.
A.Exposing…the least B.Having exposed...least
C.Having been exposed…the less D.Exposed...less
Scientists have suggested a solution to cutting down greenhouse effect: planting an area ________ the US with trees, which, when mature, would consume as much carbon dioxide as is being released.
A.of the size of B.the size of C.as the same size as D.the same size of
