选词填空: what, how, whose, where, how many,注意大小写 ---____ is your sister doing? ---She's doing her homework. ---Look! ____ T-shirt is it? ---It's Peter's. ---____ is my dress? ---It's on my bed. ---____ lessons do you have in the morning? ---We have four lessons in the morning. ---____ do you go to school? ---He goes to work on foot.