While other scientists are keeping____eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in ____humans.
A.a , / | B.an, / | C.the, an | D.an, the |
What surprised me was not what he said but _____ he said it.
A.the way | B.in the way that | C.in the way | D.the way which |
The teacher told us that the earth _____ around the sun.
A.travels | B.traveled | C.had traveled | D.is traveling |
Ted came for the weekend wearing only some shorts and a T-shirt, ____ is a stupid thing to do in such weather.
A.this | B.that | C.what | D.which |
Men and women should be treated equally according to the law, but ______ there is great room for improvement.
A.in return | B.in turn | C.in principle | D.in reality |
This raises questions of cultural relics protection which _____________ to be debated publicly.
A.deserve | B.intend | C.devote | D.fancy |