按要求完成句子。 1. I hope I can forget all my problems.(变成同义句) I hope________ ________ all my problems. 2. He often helps his brother to study English.(变成同义句) He often________ his brother________ his English. 3.1 have been to the Great Wall.(改为一般疑问句) ________you________ ________the Great Wall? 4. The teacher asked the boys to finish the homework ontime.(改为被动语态) The boys________ finish the homeworkon time by the teacher. 5. To make a pumpkin lantern is very interesting.(改为it作主语) It is very________ a pumpkin lantern.