He started to learn English in 1990 and in the years ________ he kept on using it in his work.
-- You know I dropped medicine and __________ physics.--- You made a right decision.
--Hey, Mary, you are wanted on the phone.---________I’m coming.
She is also 25 and a native of Beijing, but the ______ between us ends there.
--- Do you enjoy seeing foreign films?--- Yes. Some of them are good and the film Avatar, ______is excellent.
It is amazing that the little boy can swim ________the river ________100 meters wide.