根据问句找出相应的答句

____ Is there a river in the nature park?       A. Yes, I do.

____ Do you like the nature park?           B. Yes, there is.

____ What colour is the bridge?             C. No, there aren't.

____ Let's go to the nature park.         D. It's green.

____ Are there any fish in the river?      E. Good idea!

解方程

$5x-\frac{10}{7}=\frac{7}{5}$

X=____

下列各句中没有语病的一句是（     ）