句型转换。(20分)
(1)I'm swimming.(就画线部分提问)
________ are you ________?
(2)I'm writing a letter.(变一般疑问句)
________ ________ writ ing a letter?
句型转换。(20分)
(1)I'm swimming.(就画线部分提问)
________ are you ________?
(2)I'm writing a letter.(变一般疑问句)
________ ________ writ ing a letter?