Could someone please comment on my choices of prepositions? (correct / wrong / both are OK but X is more natural etc...

)
1) Throw it
in / into the waste basket!
2) She put some butter
in / into the pan.
3) He tucked his T-shirt
in / into his trousers.
4) She put the book
in / into her bag.
5) She put her hands
in / into her pockets.
6) She shoved her hands
in / into her pockets.
7) Insert the CD
in / into the drive.
8) The soldier jumped
in / into the trench.
1) into
2) both but I'd use into
3) into
4) both but I'd use into
5) both but I'd use into
6) into
7) both but I'd use into
8) both but I'd use into; Also, I think that
in can be ambiguous here:
The soldier jumped
in / into the trench and bayonetted the enemy machine gunner. BUT The soldier jumped
inthe trench with joy. The war was over.
