Before I talked with ______scientist, I had never met_____ clever person like him.

They develop their skills_________ they can do things better and better.

ld a harmonious society, we all have a part toplay in the fight ____ injustice, unemployment and crime.

Which would you prefer, orange juice or coffee—Either ________ OK, but I prefer coffee ________milk.

“Attention, please. Whoever can answer one of my questions _____ receive a prize,” the teacher said in class.