his young brother once wrote to him in 2005,and hasn't been heard of since为什么是hasn't been heard of 呢,hearof是收到来信的意思

Young brother Brother Green when my brother was young,he liked playing football with his friends after schoolwhen my brother was young,he liked playing football with his friends afterschool on the playgroundA.So i was B.So was i C.So did i D.So i did Although he was young,he took good care of his brother.(保持句意)Although he was young,he ____ ____ his brother very well. MY young brother My brother forgot his watch on your desk.改错 his brother is so young that he can't go to school改为简单句 My brother is young.He can't write his name.(合并为一句) 弟弟是younger brother还是young brother? my brother often visits his friends on weekands 用now替换on weekands Tom did （） better than his brother,though he was very young.A evenB manyC litterD more选哪个? his younger brother ,who is ---- ,is in grade oneA six-year-old B six years old C six-year-young D six years young His elder brother works on a farm.（用in a factory改为选择疑问句）----------- his elder brother work on a farm --------- in a factory? The young man often pays for his clothes on the Internet.（用on the Internet提问）______ _______ the young man often _______ for his clothes? his,brother,work遣词造句 On his way home,mt brother saw a big l____on the ground Peter flies kites with his brother on Sunday(改为一般疑问句) my brother -----（put ）on his coat and ----(go) out怎么填 Suppose Mr.Hobbs and his brother agreed to act on Sam's suggestion .作文