按要求改寫句子。
1．小蘭把蘆葦輕輕撥開。（改成“被”字句）
                                                                                                                   
2．教室被同學(xué)們打掃得干干凈凈。（改成“把”字句）
                                                                                                                   
3．花開得這么鮮艷，我怎么能不喜歡呢？（改成陳述句）
                                                                                                                   
4．李老師對(duì)我的深情厚誼我不能忘記。（改成反問句）