Look, the set of keys _ _ on the teacher's desk.
—Is Mary ________ heavy? —No,she is very thin.
My brother ________ glasses.
My grandfather is of medium ________ and he has black hair.
—________ does your new friend look like? —He is tall with short blond hair and big blue eyes.
—Li Lei,hurry up!The bus is coming. —Oh,no.We ________ cross the street until(直到) the traffic lights turn green.