A suspicious young man was seen ... (enter) the building shortly before the incident.
to enter
My teacher insisted on ... (clean) up all the trash, even if it wasn't ours.
cleaning
If you know how, it is easy ... (float) in water for a long time.
to float
If you go on ... (listen) to music that loud, you'll be deaf before you're twenty!
listening
Transglobe Airlines regrets ... (announce) the cancellation of today's service to Istandbul due to air traffic restrictions.
to announce
The doctor suggested that Sam ... (take) some time off work.
should take, take
I really regret ... (leave) school so young, it's ruined my career prospects.
leaving
We were all exhausted so we stopped ... (get) some rest at a motel.
to get
Darling, did you remember ... (pack) some extra memory cards for the video camera yesterday?
to pack
We had worked hard all morning, so at midday we stopped ... (have) a coffee and a sandwich.
to have
We're considering ... (get) engaged.
getting
That wound's quite deep. You really need ... (put) some antiseptic on it.
to put
Do you remember ... (see) that film last summer?
seeing