Lili is -----doing his homework-------(对画线部分提问）

Sam is doing his homework（对划线部分提问） john is doing his homework.对划线部分提问 划线部分是 doing his homework. 画线部分提问：Betty 【is doing her homework】 now.（画线部分用【】括住了） His sister is doing her homework 对her homework 提问 Mike doeshis homework in his study?对画线部分提问 I am doing my homework now.(对画线部分提问） He was doing his homework ai that time.（对划线部分提问）was doing hi his name is jim Green.(对画线部分提问） He is doing his homework at the momen.(对划线部分提问) He often (does his homework) on the computer.(对画线部分提问） How often does his homework on the computer.（对画线部分提问） Scott usually does his homework after dinner.对画线部分提问,画线部分为do