Those boys helped ____in their studies.A each other B one another C one and another D each and other 这里的答案明显D是错的...但ABC应该怎样选择,....

those boys helped one another in their studiesA each other B one another C one and another D each and other请问为什么呢 这四个都是互相的意思 可是有什么不同呢 Those boys helped ____in their studies.A each other B one another C one and another D each and other 这里的答案明显D是错的...但ABC应该怎样选择,.... He helped me with my maths =He helped me __ __ maths those are boys.改为单数句 He helped me __(found,find,finding) my book. who boys those are (连词成句） There boys are from English,and those ( ) are from America. BOYS.TIM.THOSE.AND.DAVID.ARE.(连词成句) _____(teach)those naughty boys is hard for me. those boys play basketball every afternoon改为单数 Are those boys like reading English after class?找错快 根据首字母填空 Jim is the tallest a___ those boys. Those boys like toy cars?改为一般疑问句 Those boys play volleyball every day.（改单数句） Those boys are in the classroom变为否定句 Those boys are my fyiends 改成否定句 (those boys) have a football 对划线部分提问 Greek boys helped their parents work and had h______like fishing and sailing.