I don't understand the story though there are___ new words in it.
—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.