I ______ the poor rabbit, but I didn’t have the right drugs with me at that moment.
Though the training cost a lot of time and effort, I do think it ______.
After careful consideration, he decided to take the position, ______ he knew it would be difficult for him.
The teacher handed our writings back to us, ______ some necessary changes.
You must ______ that the power is off before you leave the lab.
At such gatherings, people ______ are not necessarily your relatives or friends.