He sleeps _____ day, but _____ night he gets up.A during, at B during , at the C during the , at D during the ,at the
Sunglasses are used ________ protecting your eyes in sunny days.
Leo was late for class again. So he____ clean the classroom after school.
His wife advised him________ drinking, but he wouldn't.
That beautiful skirt is _____ cotton.
— Why _____ most stars _____ in the daytime? — Because the sun is too bright.