下列各句中均有一处错误，请指出并改正。

1. I’d like to go warm somewhere.                                             

2. I hope you to provide her with some information about the vacation.                 

3. The room needs to be enough big for all the students.                           

4. Please let us to know if it’s best to go there by train.                             

5. It’s too hot. Would you mind to open the window?                                

某溶液甲经过若干操作，析出10 g晶体后变成溶液乙（甲、乙两溶液含同种溶质），下列说法正确的是 [ ]

A．溶液的溶质质量分数乙一定小于甲

B．溶液的溶质质量分数乙一定等于甲

C．溶液的溶质质量分数乙一定大于甲

D．乙溶液一定是饱和溶液