句型转换。
（1）He goes to work on foot. (改为一般疑问句)
________ he ________ to ________ on foot?
（2）I'm going to visit my cousin next week. (对画线部分提问)
________ are you ________ to ________ next week?
（3）It comes from the vapour. (对画线部分提问)
________ ________ it ________ from?
（4）I like swimming. (改为否定句)
I ________ ________ swimming.
（5）Is your pen pal a boy?  Is your pen pal a girl? (合成一个句子)
Is your pen pal a boy ________ a girl?