判断下列介词用得是否正确，正确的画“√”，错误的画“×”，并将错误的改正过来。

( ) 1. It's time to lunch.  _________________

( ) 2. It's hot outside. Please put on your coat.  _________________

( ) 3. How about this skirt?  _________________

( ) 4. Who's at duty today?  _________________

( ) 5. My father's birthday is at the 1st of June.  _________________

( ) 6. On the street, there are many cars.  _________________

( ) 7. I can see lots with trees.  _________________

( ) 8. Do you like to play with a yo-yo?  _________________

( ) 9. There is a park in the theatre.  _________________

( ) 10. In your right, I can see two boys.  _________________

我国封闭式基金不允许折价发行。