Now more and more people are trying _____ using plastic bags, wooden chopsticks and napkins to protect the environment.
—What time do you usually go to school?—I usually go to school________six o’clock.A.inB.atC.on
________do you usually go to bed?
—Do you like apples________bananas?—I like apples.
My brother likes playing________baskctball and I am good at playing________piano.
—________do you want to do this afternoon?—I want to play soccer.