选择合适的疑问词填空。
What  What colour How much Who When Where Why
（1） __________ are you doing?
（2） __________ are you going to go?
（3）—__________ is the bag?
—Twenty yuan.
（4）—__________ will you come back?
—A quarter to ten.
（5）—__________ is that woman?
—Miss Tang.
（6）—__________ is the sofa?
—It’s black and white.
（7）__________ are you wearing a dress?