________ he works hard, I don't mind when he finishes the experiment.
The next day, the group of villagers had not gone very far ____ they entered a very narrow passage between two mountains.
—I can’t find Mr. Smith. Where did you meet him this morning? —It was in the hotel ___ he stayed.
—Are you free after school? —Sorry, I’ve planned to treat a friend of mine to dinner ______ for help.
---How did your students express their thanks to you on Teachers’ Day? ---A gift together with many flowers _______ sent to me.
We arrived home at 9:00 in the evening, __________most people had already had supper.