It seems that it is going to rain. You'd better ________ the windows open when you leave the house.

1. A.
   not leave
2. B.
   leave
3. C.
   not to leave
4. D.
   to leave

It seems that it is going to rain. You’d better ______ the windows open when you leave the house.

A. not leave          B leave       C. not to leave       D. to leave