It was the A/N1H1 epidemic ____ spread almost throughout the country ____ promoted the research and production of the flu vaccine.
My own handwriting style is different from _______of my friends.
Would you like some more coffee?
________energy, we turn off the lights for Earth Hour on the last Saturday in March
American students take part in a wide variety of after-school activities _______ they develop their social skills.
Jenny is quite good at taking notes. She can _______ almost every word her teachers say in class.