句型转换；根据括号内的要求完成句子。
1．Brazil will win the next World Cup.（就画线部分提问）
will win the next World Cup?
2．They enjoyed themselves at the party yesterday．（同义句）
They at the party yesterday.
3. Li Ying will be back in five days．（对画线部分提问）
Li Ying come back?
4. English，will，themselves，kids, study，by.（组成句子）
5. Cities will be very big and crowded.（改为否定句）
Cities very big and crowded.