Before going abroad he devoted all he could ____ his oral English.A. to improve B improving C. to improving D. improve
The European Parliament has some control ______ what happens in each of the member countries.
China came up to the sixth place in the world _____ economic aggregate(经济总量)。
It’s unfair! You sit there, listening to me, _____ I stand here, teaching you.
Only _____ our courage beats our fear ________________.
Three fourths of the surface of the earth ______ covered with water.