The patent officer ______ with my file explained to me that a plant variety is not a/an _______ invention as it is a result of adjusting growth scientifically.

I would love ______ to the party last night but I had to work extra hours to finish a report. 

The old woman was sitting under a tree, __ a picture.

Last summer holiday, I went back to my hometown, _______ the neighbors and the house _____ I used to be familiar with were gone. 

Any packet __   properly will not be accepted by the post office．