句型转换。(6分)
（1）I learned English by__learning__and__speaking．(就画线部分提问)
________  ________   you learn English?
（2）He's American.(用Italian改写选择疑问句)
________he  American________  ________？
（3）I learned a lot from our textbooks.(变一般疑问句)
________ ________ ________  a lot from your textbooks?