分类：教育/科学-外语学习
问题：英语非谓语动词1.
1.------the best student in his class,he felt very happy.A.onsidered  B.Considering  C.Having considered  D.To consider2.-Is Charlie sick?-Yes,-----------all right in the rain causes him --------a coldA.To work,catching   B.To have worked,catchingC.His working,to catch 1.------the best student in his class,he felt very happy.A.onsidered  B.Considering  C.Having considered  D.To consider2.-Is Charlie sick?-Yes,-----------all right in the rain causes him --------a coldA.To work,catching   B.To have worked,catchingC.His working,to catch  D.Having worked,caught3.He said that he much regretted --------to help us on that matter ing not able   t being able   t to be able    be not able请详细解答。谢谢
回答：1.A.Considered， 被认为，余答案无此意。
2.C.His working,to catch， 冒雨干活用动名词且时态上和问句相衔接，故选His working；cause   do sth 为惯用句型。故选to catch。
 t being able，regret doing sth. 为惯用句型且否定形式为：regret not doing sth.故不选ACD。