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. _________________
