英语题~~1.Nothing is impoossible if you put your heart in it. N

英语题~~
1.Nothing is impoossible if you put your heart in it.
Nothing is impossible if you put your heart in it,__ __?
2.Mary came to China three years ago.
Mary has__in China since three years ago.
3.Zhai became the first Chinese astronaut to walk in space.
Zhai became the firstChinese astronaut__ __ in space.
4.Shall we go for a visit to the World Expo in Shanghai during summer vacation?
__ __go gor a visit to the World Expo in Shanghai .?
1.改为反意疑问句
2.改为同义句
3.改为定语从句
4.同义句