句型转换。

按要求改写下列句子，每空只填一词。 

1. They had a good time in Beijing.（改为同义句）  

    They                            in Beijing.

2. I learn English by listening and speaking.（对画线部分提问）    

                              you              English? 

3. She went to Beijing last year.（改为否定句）  

    She                           to Beijing                             . 

4. Tom does his homework carefully.（改为感叹句）    

                               Tom             his homework! 

5. Mary, water the flowers.（改为现在进行时）  

    Mary                           the flowers.